So a friend of mine managed to get his hands on this bottle:
It's obviously 40% and made in North Korea. I can't make out the cursive script ("..hung Sul"?), but it says 인풍술 (Inpungsul) in Korean, and Kanggye is a place in the north of the country. What is it?
Inpung sul is brandy. It's made from grapes. It says so right on the bottle. 인풍술 Inpungsul is 강계포도술공장 which is Kanggye Grape Liquor Factory.
By the looks of things and the comments posted on the photo below it is a North Korean Whiskey.
https://www.flickr.com/photos/jeremyfox/7070619751/
This is confirmed by another blogger, which apparently is available from a shop at the DMZ.
Additional Info
Found another blog with the trip to DMZ with a picture of the alcohol from North Korea but the bottle for Brandy is different from the one listed in the original, but wording on the label is similar.
I'm not certain, but it sounds like Paekrosul.
According to the description on lonely planet forums.
Paekrosul:
A "well-known liquor," this is a Kanggye specialty from the D.P.R.K. (aka North Korea). Shoddy packaging, with a bottle full of defects (at least no holes beyond the necessary one) and a cap that guarantees it will leak in your luggage, hides a truly impressive liquor. A very attractive aroma, with a flavour to match, and a very nice lingering aftertaste. This is stunningly good. As an added bonus, if you drink it, you get to live for a hundred years (thus the name, which means "hundred-years liquor"). 40% alcohol.
Also a Google image search for Paekrosul returns lots of bottles with the same logo printed on the label.
