> I guess there are tons of sites on wordpress with 1-2 pages (like company site), which are in fact static but written in php and may use outdated plugin or so

> I guess there are tons of sites on wordpress with 1-2 pages (like company site), which are in fact static but written in php and may use outdated plugin or something. Depressingly true :D Text-based machine learning is an interesting one. There are a few mature tools and techniques out there for doing Latent semantic analysis, which might be a relatively low-overhead way to detect unrelated content (though some sites will produce a lot of false positives due to the nature of the sites) I guess the question is how much processing / storage you want to expend for each site in crawling it and building a model for it, so you can evaluate what has changed and whether it's in keeping with the rest of the site. ... and then of course in an election year, when people post an obligatory "go vote" message, suddenly everybody's site is triggering the hack alert. But I guess that's unavoidable whatever you do. I'd be interested to find out what the top ten "hack types" are - I'd guess that directing people to adult sites using adult images probably isn't the most common, but would definitely be in that list, so I could see why that might be useful. That said, I think a big vector for that kind of content would be via advertising networks, which would probably blacklist an uptime monitoring site anyway. Sounds like an interesting adventure though. Good luck with it!