MeAgainAtPMP on "WordPress 3.8 and JS/HiddenLink.B"

I have a user claiming the AVG Internet Security program has found the virus named JS/HiddenLink.B on my WordPress site. I am using WordPress 3.8. The only posts I can find on this are three years old and I can not detect this virus with any of my tools. How can I check for this virus and how can I clean it up if I find it?

Thanks