Pontianak comes from Malay and Indonesian mythology.
Pontianaks are women who died during childbirth, also known as vampiric ghosts. They are described to be paled-skinned with long hair and dressed in white. They usually announce their presence through baby cries. It's said that if the cry is loud, she is far away, but it it soft, then she is near by. Though it is also said that if you hear a dog/wolf howl then she is fare away, but if it's whimpering, she is near by.
How Pontianak finds and kills
Pontianak locate their prey by sniffing clothes that are left out to dry, which is the reason Malay's refuse to keep their clothes outside at night. They kill their victims by digging their sharp nails into the victim's stomach and devouring their organs. During the day, the Pontianak spirit resides inside banana trees. To fend off a Pontianak you must plunge a nail into her neck. It is said as long as the nail is there, she will become a good wife, until the nail is removed.