Did you just stumble upon a download or a file on your computer that is digitally signed by SUN ALL DAY LTD? Some of the security products refers to the detected files as Unwanted-Program ( 004befea1 ) and PUP/Win32.InstallCore. The detection rate for the SUN ALL DAY LTD files collected here is 19%. Please read on for more details.
You will probably see SUN ALL DAY LTD when running the file. The publisher name is then displayed as the "Verified publisher" in the UAC dialog as the screengrab shows:

You can view the digital signature details for SUN ALL DAY LTD with the following steps:
Here's a screenshot of a file digitally signed by SUN ALL DAY LTD:

As you can see in the screengrab above, Windows reports that "This digital signature is OK". This implies that the file has been published by SUN ALL DAY LTD and that no one has tampered with the file.
If you click the View Certificate button shown in the screengrab 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 examine the address for SUN ALL DAY LTD, such as the street name, city and country.
GlobalSign CodeSigning CA - SHA256 - G2 has issued the SUN ALL DAY LTD certificates. You can also view the details of the issuer by clicking the View Certificate button shown in the screenshot above.
The following are the SUN ALL DAY LTD files I've gathered, thanks to the FreeFixer users.
| Detection Ratio | File Name |
|---|---|
| 10/54 | mediaplayer[1].exe |
Here is the detection names for the SUN ALL DAY LTD files. I've grouped the detection names by each scanner engine. Thanks to VirusTotal for the scan results.
| Scanner | Detection Names |
|---|---|
| AVG | Downloader.EQH |
| AhnLab-V3 | PUP/Win32.InstallCore |
| Avast | Win32:PUP-gen [PUP] |
| Bkav | W32.HfsAdware.D1C2 |
| DrWeb | Trojan.Vittalia.33 |
| ESET-NOD32 | a variant of Win32/DownloadAssistant.A potentially unwanted |
| K7AntiVirus | Unwanted-Program ( 004befea1 ) |
| K7GW | Unwanted-Program ( 004befea1 ) |
| NANO-Antivirus | Trojan.Win32.Vittalia.dqfrig |
| VBA32 | suspected of Malware-Cryptor.FSP.gen |
The detection percentage is based on that I've gathered 54 scan results for the SUN ALL DAY LTD files. 10 of these scan results came up with some sort of detection. You can review the full details of the scan reports by examining the files listed above.
The analysis is based on certificates with the following serial numbers: