If you are comfortable with technical tools, you can inspect the metadata without opening the contents:

: For deeper insight, Hybrid Analysis can run the file in a sandbox and provide a report on its behavior, such as network connections or file changes. 2. Manual Inspection

: A command-line utility (often available via unzip -Z ) that lists the file sizes, permissions, and compression methods used within the archive. 3. Safety Warning What type of compressed files are supported?