This papercraft is Spring Razor, one of the deadly gadgets that is available to Corvo Attano, from the video game Dishonored, the paper model was created by PepMaster. The finished model stands about 110 mm high.
They consist of an innocuous-looking pile of coiled wire, which when triggered by nearby vibrations, the device unfolds with an audible click and its sharp wires snap outwards wildly, eviscerating anything in the vicinity.
Despite the description saying it is activated by nearby vibrations, Corvo can run around the spring razor safely without triggering it. The spring razor can also be placed on an unconscious body without killing it.
You can download the papercraft model template here: Dishonored - Spring Razor Free Papercraft Download