This has been confirmed as a real script, but is an old one. Pretty cool!  The script is watermarked with ‘Jackson Rathbone’, who plays Jasper Hale in the movie.  It’s also a “blue draft” script so who knows how much is valid towards the final making of the movie.  There’s been talk about if it was a staff member that got a hold of it, if it was found in the garbage or if it’s Jackson’s fault….who knows.