"They actually cheered on Tuesday when Korean player Seol Ki-Hyeon scored the equaliser in the Italian match, and Ahn Jung-Hwan scored the golden goal in extra time," a South Korean military source told the newspaper on Saturday.
Southern officials have said North Korean television introduced only 15 of the final 16 games, leaving South Korea out.
A North Korean escapee told Yonhap: "North Korean residents regard the blank space in the match schedule of international matches as indicating South Korea. Even though the North Korean authorities have not publicised South Korea's advance ... residents will naturally know how well the South's team has fought a good fight."
Propaganda commentaries on North Korean television aimed at South Korean audiences have however made it clear that the Cup is taking place in the South, and that the South is playing.
Such a commentary on 12 June said US team players in the South were living in "anxiety and terror amid tight security for fear of being attacked by South Koreans in an atmosphere where anti-US sentiment has been intensified".
The television showed pictures of Taegu stadium, where the South Korean and US match took place on 10 June, surrounded by riot police, along with pictures of the heavily-guarded US Embassy in Seoul.
"[They] are extremely restless and fearful, frightened by the South Korean people's unprecedented escalating anti-US sentiment and their bold struggles against the United States. We should say that this is all too well-deserved," the television said.
BBC Monitoring, based in Caversham in southern England, selects and translates information from radio, television, press, news agencies and the Internet from 150 countries in more than 70 languages.