: Private backups or person-to-person transfers often use nonsensical names for privacy.
: .rar files can contain executable scripts or malware that triggers upon extraction. CDSYOJMR4K12 rar
: Upload the file to VirusTotal to check it against dozens of different antivirus engines. : Private backups or person-to-person transfers often use
: Many malware distributors use randomized filenames to bypass simple signature-based detection. CDSYOJMR4K12 rar
Providing the context or the website where it was found can help determine exactly what it is.