PDF authors often restrict their files using PDF security features preventing users from copying, editing or printing the contents, and like every other protection this can also be easily bypassed, there exist several methods to crack or unlock PDF files, but if you are looking for a simple and fast way to just bypass the copying & printing restrictions of the PDF file Ensode online PDF Unlock Utility will be the best option, You just need to upload the file and the unlocked version of the PDF without printing or copying/pasting restrictions will be displayed in a new browser window in your default PDF application, Similarly you can use "Ensode Free Excel Spreadsheet Unlock Online Utility" to unlock Microsoft Excel spreadsheet passwords.
Another worth mention handy free utility to achieve similar results is "Freeware PDF Unlocker" allowing users to remove password and restrictions on any PDF file that you can read. The utility is very simple to use, simply drag and drop the file to remove restrictions, You do not need to know the "owner" password for this to work. Removes 40 or 128 bit passwords.
Source : http://www.megaleecher.net/Unlock_PDF