Providing this context will help in identifying if it's a legitimate tool or a known threat.
: If you downloaded this file from an unfamiliar website, a file-sharing forum, or a suspicious email, it may contain malware.
: The name "Chk Ml" could be an abbreviation for "Check Mail," "Check Model," or "Check ML (Machine Learning)." If it came as part of a specific software patch or a modding community (like for Mobile Legends ), check the specific forum or site where you found it for user feedback. General Advice on RAR Files
Since there is no public information or "good review" for a file with this specific name, you should exercise extreme caution before opening it: