The full intended phrase is likely (Download max txt). Context and Origin
The phrase "ШЄШЩ…ЩЉЩ„ max txt" appears to be a result of (often called "mojibake"). When interpreted as Windows-1256 (Arabic) characters being incorrectly displayed or processed, the first word "ШЄШЩ…ЩЉЩ„" translates to "تحميل" , which means "Download" in Arabic. ШЄШЩ…ЩЉЩ„ max txt
Attempts to rank for specific "download" keywords. The full intended phrase is likely (Download max txt)
Often, these comments contain links to external sites or file-hosting services under the guise of a "max txt" file. ШЄШЩ…ЩЉЩ„ max txt
Automated scripts that post repetitive comments to build backlinks or distribute files.
If you encountered this while browsing, it is best to avoid clicking any associated links, as they are often used for advertising spam or distributing potentially unwanted software.