No offense, but
"Trust me, Bro." Radom Dude on the Internet
Also, maybe your system is so badly infected with viruses or trojans that they are trying to spread by any means possible (created pdf).
Everyone here is old enough to judge if the risk is worth it or not.
Stay safe and healthy, friend.
Let me let you know something: At VirusTotal there is an antivirus/anti-malware engine that considers it a threat, it does not mean that it has to pay 100% attention to what that single antivirus/anti-malware engine indicates.
You must take into account in the results the reliability and prestige that the antivirus/anti-malware engine that detects the threat may have. That is to say, it cannot be assessed in the same way that an engine such as MalwareBytes, BitDefender, or ESET (prestigious and totally reliable companies for having very powerful and advanced detection engines) detects the threat as Bkav Pro (as its case) that are not known at all.
In this case, it has probably been detected as a threat by said engine, because the file is not signed. But this is not at all a reason for a file to be marked as a threat. Simply put, the engine that company uses is not reliable if it is simply based on that detail.
It is said that for a threat in VirusTotal to be considered realistic, it must provide a result of at least 10/70 - 15/70, but I also take into account the factor of the engines that have indicated the suspicion of a threat.
- On the other hand, you should not pay attention to information you find on the Internet about a supposed threat without verifying it from a reliable source.
That is to say, it is fine to search on files that you may suspect, but just because a result appears that agrees with that theory you have, it will not be true.
At this point, you should be aware that there are maliciously created pages for you to download a fraudulent anti-malware, which promises to eliminate said threat. There are companies that only dedicate themselves to aggressive marketing, creating hundreds of blogs and pages to position them in Google for any search that a user may make about malware, and there they are waiting for the user to download their fraudulent product.