If you are interested in the history and technical superiority of the format itself, these resources are highly informative:
If you have encountered this specific file, be cautious: 7z files are frequently used by malicious actors to hide payloads from traditional antivirus scanners. Top Recommended Articles on 7-Zip Security HSEKI.7z
NIST says critical vulnerability found in 7-Zip archiving software If you are interested in the history and
: A brief overview of how a single developer in Russia built a free tool that outperformed commercial giants for over a quarter-century. HSEKI.7z
: Cloudmersive explains the technical reasons why 7z files are attractive to attackers, such as "solid compression" and the ability to encrypt filenames, which makes it harder for security tools to inspect what is inside. Understanding the 7z Format