$500 Coles Gift Card Malware Scam. A Coles gift card scam offering a $500 gift card and a malware infection has been caught by MailShark spam filters. Coles is a common company targeted by scammers using the ‘gift card scam tactic’ – it is a major Australian supermarket employing over 100,000 Australians and a major employer of indigenous Australians. Delete this email from your inbox if received and avoid clicking any of the malicious links in its contents.