Did you just download a file that has been digitally signed by Daniel Riera and wonder if the file is safe? If so, please read on.
You will probably notice Daniel Riera when double-clicking to run the file. The publisher name is displayed as the "Verified publisher" in the UAC dialog as the screengrab shows:

You can view the additional details from the Daniel Riera digital signature with the following procedure:
Here is a screengrab of a file that has been digitally signed by Daniel Riera:

As you can see in the screengrab above, Windows states that "This digital signature is OK". This implies that the file has been published by Daniel Riera and that no one has tampered with the file.
If you click the View Certificate button shown in the screencap above, you can see all the details of the certificate, such as when it was issued, who issued the certificate, how long it is valid, and so on. You can also view the address for Daniel Riera, such as the street name, city and country.
UTN-USERFirst-Object has issued the Daniel Riera certificates. You can also examine the details of the issuer by clicking the View Certificate button shown in the screenshot above.
The following are the Daniel Riera files I've gathered, thanks to the FreeFixer users.Unfortunately I don't have any scan result from VirusTotal available for the Daniel Riera files at the moment. The scan results will appear here as soon as a FreeFixer user uploads a file digitally signed by Daniel Riera.
| Detection Ratio | File Name |
|---|---|
| Not available | xbku2007.exe |
The analysis is done on certificates with the following serial numbers: