Seems to be "batangche(바탕체)", one of the most common fonts in South Korea.
Batang font has been one of the top five basic fonts since Windows 3.1.
Most of the public documents of South Korea use Batang font. "Batang" means foundation or basis in Korean.
There are two types in this font; Batang(바탕) and Batangche(바탕체). "-che" means monospaced font.
But I'm not 100% sure, as there are so many Korean fonts with similar style. i.e. "Shinmyeongjo(신명조)".