Did you just stumble upon a file that has been digitally signed by Abacast Inc.? If so, please read on.
You'll probably notice Abacast Inc. when double-clicking to run the file. The publisher name shows up as the "Verified publisher" in the UAC dialog as the screenshot shows:

You can view the additional details from the Abacast Inc. digital signature with the following procedure:
Here is a screenshot of a file that has been digitally signed by Abacast Inc.:

As you can see in the screenshot above, Windows reports that "This digital signature is OK". This implies that the file has been published by Abacast Inc. and that the file has not been tampered with.
If you click the View Certificate button shown in the screenshot 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, etc. You can also view the address for Abacast Inc., such as the street name, city and country.
Thawte Code Signing CA has issued the Abacast Inc. 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 Abacast Inc. files I've collected, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 0/56 | AbacastDistributedOnDemand.exe |
The detection percentage is based on the fact that I've gathered 56 scan reports for the Abacast Inc. files. 0 of these scan reports came up with some sort of detection. If you like, you can view the full details of the scan reports by examining the files listed above.
The analysis is based on certificates with the following serial numbers: