Hi,
By downloading a scanned or protected .pdf file with Chrome,the document can be saved in a readable .pdf format.

A site I visit has lots of company news all in protected scanned images and by pressing control p for print on the link, Chrome allows either the printing or saving of the document. Press space on the save button, give it a name and press enter and the .pdf file will be downloaded to your system in a readable form.

HTH
Tom