As you can see, there is no login screen whatsoever, the dite directly asks for your information. The phishy URL and the lack of secure session indication (standard procedure in personal data transfer to legitimate institutions) are highlighted above - they are the main technical clues of phishing.
The site uses the 'Luhn's formula' algorhytm to verify the legitimacy of the card numer entered. This is a publicly available algorhytm that is used broadly in e-commerce sites. Its main function is to serve as a first-step verification. The phish uses it to reject random bogus CC numbers - hence implying some credibility. Do not fall for that trick.
Otherwise (if it accepts the number - i.e. it is a real number or a bogus number complying with the Luhn formula) it will throw the following screen at you: |
