Earlier quoted context omitted.
Yep, I run a barely popular static site, but people do love trying all the attacks on it: https://gist.github.com/Q726kbXuN/85c947a5d37cb01f72f82318d0... This is two weeks of 404s
have you thought about serving them eicar?
Though, I assume if their scanner doesn't see the response it wants, it just automatically moves on.