Whole Foods is warning that Facebook fan pages offering a free $500 Whole Foods gift card are a scam.

"The scam has been spreading virally through Facebook via 'fan pages' with names like 'Whole Foods Market Free $500 Gift Card Limited - first 12,000 fans only' and 'Whole Foods FREE $500 Gift Card! Only Available for 36 hours!' The fan page asks Facebook users to add it as a fan, thus pushing awareness of the page through those users' Facebook networks, and then asks them to fill out a credit assessment and other forms that request personal information," writes CNET News' Caroline McCarthy.

"The scam then uses a form of malware to crash users' computers and the information they have entered is left vulnerable," McCarthy writes.

Click here to read the CNET News article.