Look at the filenames and extensions inside. This often gives a clear clue about what the file is (e.g., if it contains .docx or .jpg files, it is likely a document or image backup).
Before interacting with the file, upload it to an online multi-engine antivirus scanner like VirusTotal. This will scan the file against dozens of different antivirus databases to check for known malware or malicious payloads. 2. Check the File Source Try to recall where the file came from: ASOF002FDM.7z
Compressed archives are frequently used by attackers to hide malicious scripts, executables, or trojans from basic email scanners. Look at the filenames and extensions inside