Pascal's Wager could be seen as a straw man, but it is frankly so inept that is hardy qualifies as a logical fallacy at all.
As pointed out it is based upon presupersition, but is also reliant upon the idea that it should only be applied to the Christian god, when in fact the premise works equally well for any god or deity offering an afterlife or Parousia as a reward for a "virtuous" or "Sin" free life.
For Pascal's wager to work, one would have to accept the entire pantheon of deity, known and unknown, and pledge allegiance to all of them in the hope of being forgiven by the right one for your eclectic fidelity and rewarded accordingly.