Actually, not "common" at all.
Obituaries for famous people are often done in advance, since everyone dies. It used to be one of the things that young journalists/interns did to cut their teeth.
But not every company has a massive security breach, so this was not pre-written.
It's not uncommon for big companies to fax (yes, fax) bad news to news organizations a few hours or days before posting it on their own web sites.
In the past, there would be embargoes on the information, but in the case of bad news, those are routinely ignored.
You should probably get on that.