Use a tool like 7-Zip to "Open Archive" (rather than "Extract Here"). This allows you to see the file names and sizes inside without actually running them.
In most cases, a filename like this—consisting of a short, seemingly random alphanumeric string followed by the .7z extension—points to one of three things: 🔍 Potential Origins 1. Private Cloud Storage or CDN Link 5rcdbn.7z
Upload the file to VirusTotal before opening. It will check the file against 70+ antivirus engines. Use a tool like 7-Zip to "Open Archive"
If the archive contains a .txt or .nfo file, that will usually explain the origin and purpose of the data. 5rcdbn.7z