The campaign said that genuine files were mixed up with fake ones in order to confuse people.
It said that it was clear the hackers wanted to undermine Mr Macron ahead of Sunday's second round vote.
The centrist will face off against far-right candidate Marine Le Pen.
The documents were leaked on a file sharing website late on Friday, as the official presidential campaigning period drew to a close.
What was released?
About nine gigabytes of data were posted online by an anonymous user.
