I've reviewed the crack, I don't believe it to be malicious, but it is hard to tell as it is seemingly obfuscated somewhat. There is no network activity, nor does it seem to drop any files. Here is the virus total page for the crack: https://www.virustotal.com/gui/file/aa49cc3b6b9208e4106e37bb4966288bbdb5eeaa2e5ea385f54e688a862c2643/detection
it does have a lot of detections, but they are primarily because the game itself uses enigma protection(https://enigmaprotector.com/en/about.html) to protect itself which the crack is likely screwing with to, well, crack it. I don't know enough about this enigma protection to say for sure either way though so you'll have to make your own decision.
Edit: I now further believe the crack to be safe after addition review and comparison to the original, I won't say 100% for sure though as I'm no expert, just a hobbyist security researcher.
Comments - 4
ITTMI
SEEDERY
NewDragon (uploader)
Kokoro