Safe to install?!
I can confirm that f9b9040ab552691a5f8b72369bb21a482442ce74623fb8aa93618bbf231780d0 is the file hash for the Kamo installer that you would have downloaded from Cleverbridge after purchasing the CCleaner Premium bundle.
ie: This is an official installer from CCleaner, and not an impersonator downloaded from a third-party website. The installer is safe.
This is a false positive, with what looks like a heuristic score rather than a claim of some sort of specific detection. I am not familiar with eGambit, but these more niche malware-protection engines have a habit of throwing false positives for privacy and system utility software, and tend to not have the necessary resources in their threatlabs teams to sift through whitelisting in a timely fashion. Note that the other 66 engines (including all of the better-known AV engines) show it as safe.