I'm very intrigued by this too. The consensus though seems to be that they came from completely different directions... here's a diagram that's making the rounds in Reddit[1]. It looks like this meteor landed in Russia hours before 2012DA14 even came close to being inside the moon's orbit, which makes it hard to imagine how one could have affected the other.

[1] http://s.telegraph.co.uk/graphics/html/Years/2013/February/i...