Just look at it without extracting.

it could be a rar bomb, so if you don't trust the decompressor then run it in a container/VM/jail/whatever with a RAM and disk space limit

a

rar x3

Always can be

its rare

Not if you can digest it properly

you accidentally what?

did someone mail you a zip bomb? i wouldn't extract that

It might be

it depends on what the file was, but seeing that it's less than 1GB it's probably not dangerous