Premiere has an abundance of effects. Don't have it in front of me but I'd be very surpised if it doesn't have a 'levels' effect. Play with settings and find your best results.

However, it's a given that within the digital realm you get much better results extracting details from an under-exposed (dark) image than you do from an over-exposed image so don't expect miracles I'm afraid!

You should be able to find some sort of improvement though. Just don't hold your breath during the 'render' phase