Filenames like this are common in "combolists" found on the dark web or credential-sharing forums.
The specific filename does not appear to be a standard or widely recognized public guide. However, files with this naming convention typically appear in one of three niche contexts: 1. Marketing and Lead Generation
If you encountered this file as a downloadable link from an untrusted source, do not open it . Files like this are frequently used to distribute malware or spyware , especially if they are bundled in .zip or .rar archives. You can check if your email was part of a major breach using tools like Have I Been Pwned .