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Password-protected PDF Samples


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11 replies to this topic

#1 Psynt555

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Posted 22 July 2014 - 08:44 AM

Dear Users,

I am in need of a large amount of password protected PDFs (say 1000), so that I may tally the most commonly used passwords.

Does anyone know where I could find such a thing?

Any help would be much appreciated,
Thanks.


Edited by Psynt555, 22 July 2014 - 08:44 AM.


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#2 Darktune

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Posted 22 July 2014 - 09:25 AM

How would this allow you to tally commonly used passwords?

 

There are plenty of reports online regarding commonly used passwords.


It's very hard to imagine all the crazy things that things really are like. 

Electrons act like waves.. no they don't exactly, they act like particles.. no they don't exactly.

Words and ideas can change the world.


#3 Psynt555

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Posted 22 July 2014 - 09:31 AM

How would this allow you to tally commonly used passwords?

 

There are plenty of reports online regarding commonly used passwords.

Thanks for your reply,

I am attempting to break them with some software I have acquired for research purposes only.

Yes, there are plenty of reports online about commonly used passwords, but not specifically for PDF files.



#4 Darktune

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Posted 22 July 2014 - 09:39 AM

Yes, there are plenty of reports online about commonly used passwords, but not specifically for PDF files.

 

 

Is there a difference between commonly used password on PDF documents?

 

Do you think you've found a flaw in a PDF reader?


It's very hard to imagine all the crazy things that things really are like. 

Electrons act like waves.. no they don't exactly, they act like particles.. no they don't exactly.

Words and ideas can change the world.


#5 Psynt555

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Posted 22 July 2014 - 09:43 AM

 

Yes, there are plenty of reports online about commonly used passwords, but not specifically for PDF files.

 

 

Is there a difference between commonly used password on PDF documents?

 

Do you think you've found a flaw in a PDF reader?

 

I guess there isn't, but that's not the point I'm trying to make. I'm documenting PDFcrack. It's a free open-source Linux based software that cracks PDF passwords using a combination of brute forcing and dictionary attacks.

The reason behind this is that it is for my Masters Project at University.



#6 Darktune

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Posted 22 July 2014 - 10:00 AM

I guess there isn't, but that's not the point I'm trying to make. I'm documenting PDFcrack. It's a free open-source Linux based software that cracks PDF passwords using a combination of brute forcing and dictionary attacks.

The reason behind this is that it is for my Masters Project at University.

 

 

I know it's a lot of work but can you create PDF's yourself with different passwords?

 

I mean I doubt people will give you important documents.


It's very hard to imagine all the crazy things that things really are like. 

Electrons act like waves.. no they don't exactly, they act like particles.. no they don't exactly.

Words and ideas can change the world.


#7 Psynt555

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Posted 22 July 2014 - 10:15 AM

 

 

I know it's a lot of work but can you create PDF's yourself with different passwords?

 

I mean I doubt people will give you important documents.

 

 
On the contrary that's easy to do. There are several free command-line tools that allow you to add pwords to PDFs. Add a nice bash script and I could do thousands in a few seconds.

I guess I neglected to say I'm not supposed to know the passwords!.

Yeah you're right, that's why I'm finding it difficult to find a plump repository with "break me" written on the front on Google.



#8 Darktune

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Posted 22 July 2014 - 10:19 AM

If it was a tool that is based on a dictionary/brute attack it wouldn't matter if you knew the password. 

 

For example if you had say 300 PDF's you created yourself ALL with different passwords and they are named PDF1 PDF2 PDF3 etc.. It's unlikely you'd remember all the passwords for all 300. 


It's very hard to imagine all the crazy things that things really are like. 

Electrons act like waves.. no they don't exactly, they act like particles.. no they don't exactly.

Words and ideas can change the world.


#9 Psynt555

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Posted 22 July 2014 - 10:24 AM

If it was a tool that is based on a dictionary/brute attack it wouldn't matter if you knew the password. 

 

For example if you had say 300 PDF's you created yourself ALL with different passwords and they are named PDF1 PDF2 PDF3 etc.. It's unlikely you'd remember all the passwords for all 300. 

I suppose I am not going to remember 300 like you say. This has given me some thought. Thanks



#10 Animal

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Posted 22 July 2014 - 12:08 PM

Bleeping Computer can't help supply you with password protected documents. The reason for that is spelled out in the forum rules:

No subject matter will be allowed whose purpose is to defeat existing copyright or security measures. If a user persists and/or the activity is obviously illegal the staff reserves the right to remove such content and/or ban the user. This would also mean encouraging the use or continued use of pirated software is not permitted, and subject to the same consequences.


Bold above is mine for applicable portion of the rules in this case.

A password is considered a security device. You admit that your intention is to crack that security. Regardless of the purpose of your intentions of cracking passwords the rules are quite clear.

The Internet is so big, so powerful and pointless that for some people it is a complete substitute for life.
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A learning experience is one of those things that say, "You know that thing you just did? Don't do that." Douglas Adams (1952-2001)


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#11 Psynt555

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Posted 22 July 2014 - 12:35 PM

Bleeping Computer can't help supply you with password protected documents. The reason for that is spelled out in the forum rules:



No subject matter will be allowed whose purpose is to defeat existing copyright or security measures. If a user persists and/or the activity is obviously illegal the staff reserves the right to remove such content and/or ban the user. This would also mean encouraging the use or continued use of pirated software is not permitted, and subject to the same consequences.


Bold above is mine for applicable portion of the rules in this case.

A password is considered a security device. You admit that your intention is to crack that security. Regardless of the purpose of your intentions of cracking passwords the rules are quite clear.

 

Lock/delete this thread if you don't want anybody replying.


Edited by Psynt555, 22 July 2014 - 12:35 PM.


#12 Animal

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Posted 22 July 2014 - 12:41 PM

I left it open so you could comment and or add mitigating information if it was available. But I will lock the topic now.

The Internet is so big, so powerful and pointless that for some people it is a complete substitute for life.
Andrew Brown (1938-1994)


A learning experience is one of those things that say, "You know that thing you just did? Don't do that." Douglas Adams (1952-2001)


"Imagination is more important than knowledge. Knowledge is limited. Imagination circles the world." Albert Einstein (1879-1955)


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