I need to know whether they are malicious or not.
Hello @UrekaPullets ,
Those are the malware signature files of Bitdefender. They are 100% legitimate and safe. They keep updating to make sure the antivirus application can detect and prevent new malware.
Nothing to worry, your computer will be safe. Make sure Bitdefender is updated.
If this response helps, please click on the agree button.
Thanks and regards,
Well that would make sense, don't worry its always up-to-date.
Thanks for clarifying.