I’ve recently started seeing a new type of spam. It only appears on posts with images. The content of the spam appears to be innocuous, but the Name and the URL of the commenter are both spammy. The content of the post, although innocuous, appears to be a description of the image. For example, if the image was that of a cat, the comment might be:
“This is a cute picture of a cat stretching out his legs.”
What’s going on here is likely the sort of thing that spammers use to defeat CAPTCHAs. They’re presenting the image in the post to a user who wants something, and the user is providing innocent, human and relevant text to help the spam slip by the filters. Then, a spam comment is submitted on behalf of that user, using the text they provided. Heck, the user may end up submitting the spam themselves, in order to get a nice innocent-looking IP address and user agent. I’ve seen a few of these spams slip by both Bad Behavior and Akismet.
Has anyone else seen spam like that? If you have posts with an image, check them. The comment might have looked innocent enough to slip by you!