Threat Level: green Handler on Duty: Didier Stevens

SANS ISC: New mutation of PDF spam - SANS Internet Storm Center SANS ISC InfoSec Forums


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New mutation of PDF spam

A few weeks ago we reported on new spam using PDF attachments. These were professionally designed and contained graphs and detailed information on the stock in question. In general, they covered one stock on the Frankfurt stock exchange each.

During the last two days, we've received continuous reports of new PDF spam. This time the pages attached are generally of different size each time (no longer A4, but 4x3 inch or 6x1 inch). The text also has been obfuscated which makes it much less readable, but also more difficult for spam filters to assess through OCR.  Stocks mentioned are now listed on NASDAQ instead of the European exchanges.

Maarten

158 Posts

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