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.
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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:
From: [random addresses] To:[random recipients] Subject: New Resume>>Please review my CV, Thank You!>> Attachment:resume.pdf
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 malware families.