KABUL, Afghanistan — An Afghan court in northern Afghanistan sentenced a journalism student to death for blasphemy for distributing an article from the Internet that was considered an insult to the Prophet Muhammad, the judge in charge of the court said Wednesday. The student, Sayed Parwiz Kambakhsh, 23, who also works for a local newspaper, was charged with insulting Muhammad by calling the prophet “a killer and adulterer,” the judge, Shamsurahman Muhmand, said in a telephone interview. The sentence was denounced as unfair by Mr. Kambakhsh’s family and journalists’ organizations. Mr. Kambakhsh’s brother, Sayed Yaqub Ibrahimi, denied that his sibling had committed blasphemy, and said that his brother was not given enough time to prepare his defense and was denied a lawyer. Mr. Kambakhsh has the right of appeal to the regional court and the Supreme Court. He is being punished for articles written by his brother, said Jean Mackenzie, director of the Institute for Peace and War Reporting