Spam links appended to website & RSS feed – can’t find!

Spam links show up at the bottom of the website *and* at the very end of my RSS feed – which break the feed.

I’ve looked around the forums, and people seem to be solving this by finding the spot in the PHP templates that’s been hacked: I’ve looked in every file, and can’t find a thing.

I’ve also checked the site itself for new files, or files that have been modified *after* I last went in … nothing there either.

So I’m stumped.

Any other theories about the source of this crap?

https://www.sparkletack.com is the site … the spam links show up at the very bottom:

# Legalsounds
# uk vpn
# usa vpn

(I know, it’s my own fault for not upgrading. I’m going to do that the second I figure this out.)