Using a credit card to maliciously overdraw, the amount is more than 50 thousand yuan but less than 500 thousand yuan, which belongs to the crime of credit card fraud with a large amount.

According to the relevant regulations, using forged credit cards, credit cards fraudulently obtained with false identification, invalid credit cards or fraudulent use of other people's credit cards for credit card fraud activities, the amount of which is more than 5,000 yuan but less than 50,000 yuan, is a relatively large amount of credit card fraud; If the amount is more than 50 thousand yuan but less than 500 thousand yuan, it is a huge amount in the crime of credit card fraud; If the amount is more than 500,000 yuan, it belongs to the "extremely huge amount" case in the crime of credit card fraud.