This will help in providing a more specific assessment of its legitimacy.
Based on available technical data and common security patterns, appears to be a compressed archive file (using the 7-Zip format) that is often associated with unofficial software distributions, game mods, or potentially unwanted scripts.
: Before opening, upload the file to VirusTotal to have it scanned by over 60 different antivirus engines. Community Perspective
: High . Compressed archives are a primary vector for malware because the encryption/compression can sometimes bypass basic browser-based virus scans.
Because it is a generic filename rather than a mainstream commercial product, a "review" of its contents depends heavily on where you acquired it. Technical Overview
: The .7z extension indicates it is a high-compression archive created with 7-Zip . You will need a utility like 7-Zip or WinRAR to see what is inside.
: Often flag these archives when they are distributed via "SEO poisoning" (fake download links that appear at the top of Google results).