‘bin needs to download the font “Nanum Myeongjo”’
Nanum Myeongjo is a free Google font. When a program asks to download a font, it is because it is because it calls for it but it is missing from your font library. This is a normal behavior, but you can ignore it if you want.

The Adware.Spigot is most likely unrelated to the font and is not a virus, but it is Adware. Adware is not a virus, but it can be considered Malware, which is an unwanted program. I would recommend removing it.