The content was 100% real, though the "I found this laptop and it happened to belong to Hunter Biden" story was obviously a pretense to release content that had been obtained illegaly — likely from a hostile foreign state.
I guess it wouldn't have looked good if Rudy Guliani came out and said "the Kremelin gave me compromising videos of Joe Biden's son".
Which is what makes it a "misinformation" campaign.
Folks on this site have a childishly simple view on information and propaganda. I've heard many people say if it's true it can't have an agenda. But what you say is just as important as what you DON'T say.
When the Russians hacked both the DNC and the RNC and leaked only the DNC emails to WikiLeaks who gladly posted them (because to be fair Clinton and Obama wanted Assange's head), and used the RNC info to blackmail Republicans, that's a misinformation campaign.