"Trial1 1.rar" is a non-standardized archive likely serving as a temporary or experimental container. Unless it is a file you created personally for a project, it should be treated as until the internal files are inspected in a secure, isolated environment.
Compiled programs being tested for the first time. Trial1 1 rar
Often used as a placeholder name for malware samples or "proof of concept" exploits in sandboxed environments. "Trial1 1
Proprietary RAR (likely RAR4 or RAR5). Common Use Cases: Trial1 1 rar
Because "Trial1" is a generic and frequently automated filename, it carries a if obtained from an untrusted web source.