With my "uber elite" skills, i managed to find out that the file in the cache which avira finds infected is a picture that one guy posted.
I opened the jpg with notepad and found a java script in it that leads to one page that seems legit
I dont suppose my PC is infected now -,-
P.S. save the trouble of posting mbam instructions as i do that daily (no offense, I said this just so we can solve it faster)