At no point in the official statement [0] is Russia EVER blamed for the DNC hack and subsequent leaks. This statement has given the media carte blanche to make the accusation themselves.
When previously posted, numerous people have said it does accuse the Russians of this. I would urge you to read the statement extremely carefully. The amount of intelligence and man-hours that go into crafting something like this is huge. There is a reason why at no point, is any current official coming out and explicitly accusing Russia of the DNC hack. Note that at no point has POTUS, Earnest during press briefings of Clinton ever accused the Russians of the DNC hack. Every time they refer to the matter they take great time and care to get their wording right.
[0] https://www.dhs.gov/node/23199
edit: What I am saying is not far-fetched or crazy. For those down-voting I hope you get a lawyer before signing any important legal document.
Do not forgot Bill Clinton during his trial at the Grand Jury :"It depends upon what your definition of is is."