It's completed unrelated to the site attack last month. Looks like it's just another spambot, this time one that's sending PMs.
Just a general note/warning, but please be careful with PMs, especially from new users with virtually no posts, or PMs that have a lot of links in them. In this case, this spambot claimed that there were new rules. Any new rules for AFC will come directly from us (or our user/bot "Foaly"), not from a random user.
In any case, I've banned this spambot. If you get any suspicious PMs, please contact one of the mods and we'll take care of it.