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Spam E-Mail Virus Returns

by Tim Stevens on November 2, 2007 at 12:17 PM

PDF Spam Redux


Back in August, we reported on a new form of spam that was sweeping inboxes around the world: the use of PDF attachments to hide product pitches from spam filters. That seeming flood of spammy attachments was apparently more of a wave, which passed quickly and seemed to be gone. But now the PDF spam scourge is back, with hundreds of thousands of these attachment e-mails being received over the past few weeks. And, troublingly, the PDF attachments in those e-mails are infected with viruses that can lead to trouble down the line for your computer (and your personal information).


If opened, the PDFs use a flaw in the Acrobat Reader PDF viewer that enables the sender to install so-called malicious software, or malware. This malware actually goes out and downloads, then installs, other malware from other machines. Thankfully these programs don't appear to actually impact or corrupt the files on your machine, but they can be used to send that personal data to someone, and can also be used to turn your computer into a so-called zombie, which means it can be controlled remotely to participate in the sorts of attacks that were levied against Estonia in May.

So, as always, watch those attachments. If you don't know what the PDF contains or who sent it, don't open it.

From Network World

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Tags: e-mail, PDF, spam, virus

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