Use a tool like 7-Zip to "Test" the archive. This will list filenames without extracting them.
Without the ability to inspect the file directly, a write-up depends on the context of where you found it. Possible Contents Noah.7z
did you download the file from (e.g., GitHub, a forum, a personal email)? What is the approximate file size? Do you have any information about the original author? Use a tool like 7-Zip to "Test" the archive
If the source is unknown, do not extract it on your primary machine. Use a Sandbox or a Virtual Machine. Noah.7z