Based on the file naming convention, this appears to be a reference to the 2019 South Korean blockbuster "The King's Letters" (also known as "Kingdom: The Great General") or potentially a mislabeled file for "Kingdom" (2019) regarding a General.
Phishing Scams: Sites may ask you to create a "free account" and steal your credit card information. gm21.link.Kingdom.4.Return.of.the.Great.General...
Plot of Kingdom 4: Return of the Great General (Movie): This film adapts the Bananji Campaign and parts of the Kokuyou Campaign. Based on the file naming convention, this appears
: The story centers on the Battle of Mayang, where Shin and his Hishin Unit face overwhelming odds. The Rivalry : The story centers on the Battle of
In Japan, the live-action film series has been a massive hit.
The string uses dots instead of spaces or slashes (gm21.link.Kingdom.4...). This is a classic pattern used by: