is a specially-crafted Portable Document Format (PDF) file that exploits a vulnerability in Adobe Acrobat and Adobe Reader described in the following articles:
is known to be part of the "Blackhole" malware distribution kit.
Some of the servers it is known to connect to are:
The file is then saved in the computer as "wpbt0.dll".
As of this writing, the files are no longer available.
Analysis by Daniel Chipiristeanu
There are no common symptoms associated with this threat. Alert notifications from installed antivirus software may be the only symptoms.