This cube craft paper toy is Captain America (Winter Soldier Ver.), a superhero from the Marvel Comics' comic book Avengers, the papercraft was created by briciocl. There is also a Movie Ver. Captain America Cube Craft on the site, and for more Captain America papercrafts please click on: Captain America Paper Crafts.
You can download the cube papercraft toy here: Avengers - Captain America Cube Craft (Winter Soldier Ver.) Free Paper Toy Download