Many "cracks" are flagged as Malware by AV engines because they behave like viruses (modifying memory), even if they aren't "malicious" in intent.
Are you trying to of a file you just downloaded? NeedForSpeed.7z
Compressing large game assets or distributing "cracked" software. Many "cracks" are flagged as Malware by AV
Run SHA-256 or MD5 to uniquely identify the file. Header Check: Verify the signature ( 37 7A BC AF 27 1C ). NeedForSpeed.7z