Your answer as well as Peter's are both correct. "A look of pure venom" is an example of figurative language. Literally, "venom" is synonymous with "poison," which is harmful or deadly. Thus, the phrase means that someone who's got such a look has nothing but evil intentions. :)

Yes, it means to look at someone (or something) with pure hatred. Good luck with learning more!

instantaneous anger hatred scorn cheers