: Use a tool like 7-Zip or WinRAR . Right-click the file and select "Open Archive" (instead of "Extract") to view the file tree and file extensions without executing anything.

: In cybersecurity or data research circles, numbered zip files are sometimes used to store categorized datasets or logs.

"Pack 1373.zip" is not a widely recognized or standardized software package, official driver set, or famous digital archive. Because filenames like this are generic, the "deep content" depends entirely on the specific source from which it was obtained.

Knowing the source website or the intended application would help in identifying the specific contents.

: Randomly generated names for cloud storage backups. How to safely check the content: