Actually, they confirmed this. The US CIA/FBI confirmed that the malwares/hackers were traced back to a network of Bureau 121 (possibly Chinese/Korean hackers), a network of hackers for hire working for N. Korea. The CEO from Sony, Michael Lynton said that all the movie theaters in America told him they would not carry it after they received the threat. Sony Pictures do not control movie theaters. So Sony has to choice but to pull or delay the release of the film. I don't blame Sony Pictures, it's better be safe than sorry. Furthermore, the Hackers have their information. If they release the **Interview, Sony will truly face another nightmare from retaliation.
**Honestly, I think this is a little bit poor taste. Which execs in their right mind at Sony would green light this project? Mocking a N. Korean leader whom had nuclear power and been wanting to fight with the US/West since forever! At least, if you're going to make a satire plitical comedy, make up some fake name or use a fake country Like **The Dictator. LOL (BTW, that 007 Bond Movie Die Another Day also deals with this idea, that was one cool ass Bond Movie.)
** I want to see this movie now, lol, if it releases on Netflix, I'll watch it in my comfortable own room.
**Another thing I find hilarious/poor taste is the email between Scott Rudin and Amy Pascal, with Rudin calling Angelina Jolie **A Minimally talented Spoil brat!! And Both Rudin and Pascal insulted President Obama being Black and liking **Black movies like DJango or 12 years... Sighhh