Start MS Word. Then from the PDF toolbar select Open PDF.
You can now edit your PDF in Word. Cool, eh?
When you are done editing select Create PDF from the PDF toolbar.
A Save As window will open. Select a name and location for your corrected PDF document and click Save. On this step you can set some additional properies of the new PDF file which are optional, such as Author, Subject, Password, Encryption, etc. For more details about these look here