That is definitely a Cuban tree frog and he (or she) needs some feeding up and rehydration asap. If you plan on keeping this frog (not sure they are a non-controlled or allowed species in PA, you'll have to check regulations) you'll need to have a large enclosure for it when it's mature; these guys can get bigger than White's tree frogs! And WTFs require a minimum of 20 gallon for one frog (10 gallons for each additional frog). They are definitely an arboreal frog and will need a taller terrarium like an Exo-Terra vs standard aquarium.

You also should definitely get fecal testing, and perhaps a skin swab, on him as well. He should also be placed into a simple quarantine tank with just paper towels for substrate, a dish of dechlorinated/treated water (Reptisafe is good), and plastic plants for hiding in/climbing.

Good luck!