If you have Adobe Reader installed on your machines (and most users do, since it’s the most popular PDF reader), you need to be aware of a new Trojan that represents itself as an Adobe update, with identical icons and version details that can even circumvent antivirus software. The Trojan is a nasty one, called Troj Faykdobe, that installs malware that can be used to send passwords and other credentials to a remote server. The good news is that it apparently doesn’t affect Vista and Windows 7. The bad news is that there are still plenty of XP computers out there that are vulnerable. Read more about it here:
http://itknowledgeexchange.techtarget.com/security-bytes/new-trojan-masquerades-as-adobe-update/