I'm a IT technician and I use Macs at home. I also try to give advices and user tips to my customers to improve their security. Sometimes, around the internet, I find some scams or ads telling me I have viruses or something weird and I sometimes download it just to test antivirus software, or just to try to imitate my customers to try to learn about how they get infected so I can give them up to date information.
Some days ago I found a quite convincing warning about my flash player being outdated (funny, because I don't have any installed ;) ), so I downloaded it, and then uploaded to virustotal.com, where only one AV detected it (here's the report). Opening the .pkg file I found it's a bundle of adware with some known guys like Mackeeper.
My question is: What could I do to report it, so I can help AV manufacturers to detect it as soon as possible so other people can be aware?