Fighting unicode-obfuscated spam

  title={Fighting unicode-obfuscated spam},
  author={Changwei Liu and Sid Stamm},
  booktitle={eCrime Researchers Summit},
In the last few years, obfuscation has been used more and more by spammers to make spam emails bypass filters. The standard method is to use images that look like text, since typical spam filters are unable to parse such messages; this is what is used in so-called "rock phishing". To fight image-based spam, many spam filters use heuristic rules in which emails containing images are flagged, and since not many legit emails are composed mainly of a big image, this aids in detecting image-based… CONTINUE READING
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