It is an official component developed by Microsoft. It is not a virus, malware, or spyware. Because it is a system file required for specific diagnostic operations, it should not be deleted or quarantined by security software.
These errors usually indicate that the Windows Recovery Environment is trying to launch a diagnostic tool, but the library file is either deleted, moved, or corrupted. recdiag.dll
and want a security/malware analysis paper: I can help structure a forensic paper – but you would need to provide hashes, behavior (via sandbox), or PE structure details. It is an official component developed by Microsoft