If you suspect the file might be malicious, perform the following steps:

Internet Download Manager (IDM) is a legitimate tool used by millions to accelerate downloads. However, due to its popularity, it is also one of the most frequently cracked or "patched" software titles on the web. Cracked versions often rename or generate custom DLLs, executables, and, notably, debug files.

: Using a crack typically disables official updates, leaving you with an outdated version that may not work with newer browser updates. IDM Installation and Crack Guide | PDF - Scribd