Checking A File Before Using

Howdy yall. I am wanting to download an run a JAR from a Discord I am a member of, but I want to make sure I do my due diligence before running it.

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Facts / things I have already done.

This is a Minecraft thing

The Discord I am a member of is the official Discord for the modpack I am playing.

The jar claims to fix a bug that the devs haven't addressed yet.

It was posted by a member that has been on Discord since 2016 and active in this server since 2023.

It has been referenced multiple times including by devs of the pack with no reports of problems.

It passes a scan with no flags at virustotal.com
https://www.virustotal.com/gui/file/1abdf91e4b662132eec46565fed206eda4cef9a4514f4c2e4acf2ca431f3a839

I am planning to run it first on an unraid vm with a dedicated hard drive and no networking.

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What more should I be doing to give myself the best possible chance of being safe? It seeeeems fine, which is the only reason I'm even entertaining the idea, but in this day and age you can't be too careful.