There are alternative explanations, unfortunately contradictory, according to two "experts" I heard on the news.

One said the aircraft might have simply run out of fuel, or hit by ground fire, then spun to earth in a "twirling leaf" spin, like a descending boomerang, hitting the ground at a low velocity, causing minimal damage. If it were out of fuel, it would be quite light for an object that size.

The other is that the drone crashed hard, and took severe damage, and the Iranians have been feverishly working on the parts to make a presentable trophy for the news cameras all week. You will note the bottom of the craft is concealed in the Iranian trophy display.

It's always possible they hacked the link and flew it down, but I think that unlikely. Even if they had been able to defeat its security and hijack it, it's unlikely that someone, even a skilled remote pilot, could have brought it in without extensive training and practice on that particular model.