Upload the file to VirusTotal . It will check the file against over 70 different antivirus engines and tell you if it's a known threat.
Many files with names like this are part of "survey scams" where you are asked to complete an offer or download a "password cracker" to see the contents, which usually leads to further malware. CCIH2.rar
It may be a private backup or a specific internal file for a company or small group (e.g., related to chemical research, as "CClH2" is a chemical formula fragment often found in academic papers). 🔍 How to Safely Check It Upload the file to VirusTotal