Exploit:W32/PDF-Dropper.Gen is a Generic Detection for a malicious PDF file that exploits a known vulnerability in Adobe Acrobat Reader to drop a trojan onto the affected machine. This detection is associated with a spam run reported on June 8, 2010.
More details about the spam run are available from our Labs Weblog post
The malicious PDF document is distributed as an file attachment to an e-mail message that has the following characteristics:
If the unsuspecting user opens the PDF attachment, the exploit is executed.
On execution, the exploit drops a variant from the Alureon or Trojan:W32/DNSChanger
About Generic Detections
Generic Detections are a type of sophisticated detection used by antivirus programs to identify files with malicious characteristics.
Unlike more traditional detections (also known as signatures or single-file detections
) a Generic Detection does not identify a unique or individual malicious program. Instead, a Generic Detection looks for broadly applicable code or behavior characteristics that indicate a file as potentially malicious, so that a single Generic Detection can efficiently identify dozens, or even hundreds of malware.
For more information, see Other:W32/Generic