Is the Hadith describing “ك ف ر” written on the Dajjāl’s forehead influenced by earlier Christian apocalyptic traditions?

In early Christian apocalyptic literature, particularly the treatise "A Discourse on the End of the World and on Antichrist" (often attributed to Pseudo-Hippolytus), the number 666 is sometimes interpreted not as a personal name, but as symbolizing the act of denying Christ. In the pseudo-Hippolytus tradition, 666 has been linked to the Greek word arnoume (ἀρνοῦμε), meaning “I deny,” using a particular isopsephic spelling variant. In Islamic eschatology, several narrations found in Sahih al-Bukhari and Sahih Muslim describe al-Masīḥ al-Dajjāl as having the letters “ك ف ر” (kāf–fā’–rā’)(disbeliever) written on his forehead, readable by every believer. My questions are: How do contemporary Muslim scholars respond to claims that this hadith may have been influenced by Greco-Christian apocalyptic writings? Also how the reassess the reliability and authenticity of this hadith from above concerning perspective?