Few years back I created some HelloWorld application on Google's AppEngine (requires Java, Python or Go) and was positively surprised about its statistics on theirs dashboard.
I get requests to /wp-login.php (and the like) on my simple Haskell web app hosted on my university's servers. They're quite persistent and I'm not even sure how found the URL to my app in the first place (the format is something like universityname.com/~userid/projectname, and I haven't linked it anywhere).
and it wasn't even running on wordpress