Santandercards.co.uk

How can this site hXXP://XXX.santandercards.co.uk/eservice/authentication/asda  be identified by Norton as malicious??  Its the main log-in for all credit cards.  Can someone f rom Norton please explain!!!!

 

Santander cards say they are not aware!!!!

 

<<Edit: disabled active link to possibly malicious Website per the participation guidelines.>>