404 Error from site - is this normal?

[Force7]

I have been trying to clean up any 404 errors. We keep getting the following:

URL

/include/vdimgck.php            referring domain http://www.856d.c@m/plus/feedback.php

rendered domain unclickable by adding the "@" since I do not know if it is safe.

I just turned off the trackbacks and pings in the blog since I saw it was producing duplicate content and from what I read it is not worth keeping those with Wordpress.

is vdimgck.php anything some here instantly recognizes ?

It tops all our 404 errors, seems like a lot of requests.

Thanks!

[zigojacko]

Does the file/page exist on your website (/include/vdimgck.php)?

Does the referring URL contain a link to this location?

Looking at some of the search results for a search on that filename, it looks like it could be malicious or your site may have been hacked. Check the location on the server to see if it exists first.

[Force7]

I went to the main site and it is a page set up with just the domain name, looks like there is no real website with links.  Looks suspicious for sure. Thanks for helping! I will investigate this further.