Rapidshare hack!!!!! Free premium acount for all

hi i got the encrypted message if you decode that message you get a link to register premium acount on rappit share but i dont have a decomipler for PKCS7 help me decode this message and we have all free premium acounts.

Code:
<form action="https://www.paypal.com/cgi-bin/webscr" method="post">
<input type="hidden" name="cmd" value="_s-xclick">
<input type="image" src="https://www.paypal.com/en_US/i/btn/x-click-but03.gif" border="0" name="submit" al...
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