Yes, could well be a False Positive: http://wepawet.iseclab.org/view.php?hash=fb7a68ae76670a77803f7902660e3c22&t=1300552294&type=js
because they even warn about this being flagged by av on their website:
Iroffer is not a virus, trojan or backdoor. It is a file server like FTP.
If you don't have installed this software yourself, but a scanner reports it on your harddisk, Iroffer has been installed by a malware after successful compromising your computer.
quote source link: http://webcache.googleusercontent.com/search?q=cache:SO7Qkv_Edi0J:iroffer.dinoex.de/wiki/1/export/special+malware+domain+iroffer.dinoex.de&cd=1&hl=nl&ct=clnk&gl=nl&source=www.google.nl
polonus