(fEstasAzulCorrupta) is a virus that affects all microsoft documents talk about word, excel, powerpoint etc.
The first thing you need to do is eliminate the virus from your system, I would recommend you update your antivirus and do a scan of your entire PC.
To be sure you eliminated the virus you can download a Malicious software removal tool there are a lot of free ones on the net.
After eliminating the virus you can recover your documents using a document recovery tool like Ultimate Office Recovery 2013
Had the same problem too