Ask HN: Does anybody know what 'searchbenny' is? 11 years ago
I had the same problem and just fixed it.
it was an extension named "fast search" in the Safari > Preferences > Extensions section. I unistalled it and the problem was solved!
Before that though i moved to trash all the suspicious files from the Finder > Applications section as they were described from the wildthing84 below.
hope i helped