I have not studied the content yet but after your comment I checked and also found this reddit thread[1] claiming it is old. But not sure if anyone has actually validated the content and confirmed that it is indeed old.
Also not sure if @CthulhuSec is actually Anonymous. It was @YourAnonNews who picked up the news and made it look like it was Anonymous responsible as far as I can tell. Thomas White (CthulhuSec) also has pointed out that it has nothing to do with Anonymous.