Before opening individual files, it is good practice to run a scan using Virustotal to ensure the archive was not bundled with unwanted scripts.
Likely an abbreviation for a digital archive entry of a satirical/humor magazine. Issue Number The first issue of the specific volume or month. 9-10 September 10th. 15 Lolmag- 1-9-10-15.7z
Some speculations suggest that Lolmag- 1-9-10-15.7z might contain: Before opening individual files, it is good practice