How to use box collision as hitboxes for paper flipbook

Hey guys, I’m new around here and trying to learn ue4 for a short times. I have a problem these days and it is about hitboxes.

I found that UE4 does not have hitboxes system and find another way to solve this. The most possible i got is to manually make box collision for each part of body, and divide actions. But how can I attach these boxes to the animation, which mean i can active a certain boxes depend on what flipbook is playing and change shape of boxes base on frame ?

Other way, should i make these boxes in each sprite, before creat flipbook ? In this case, how can I define these boxes in blueprint and overlap them?

Thanks!