title: Remove PDF metadata (removing complete PDF metadata )
body: <p>I want to remove metadata from PDF files. I have already tried to use "exiftool", "pdftk" and "qpdf" to remove the metadata (method proposed - <a href="https://gist.github.com/hubgit/6078384" rel="noreferrer">https://gist.github.com/hubgit/6078384</a> ). These tools claim to remove metadata but unfortunately retain them. I used "grep -a metadata_fieldname file.pdf" option and I could retrieve the metadata value.</p>
  
  <p>Is there a way to completely delete the metadata information from PDF files (delete all the objects containing metadata information). </p>
  
  <p>I am using Ubuntu. When I create a PDF file using LaTeX tool (ex- pdfTeX) or LibreOffice, the tool automatically writes the information of Producer, Creator and sometimes Full banner etc.. in the metadata of the PDF file. So I am looking to remove this information from PDF files (basically the metadata information stored by the PDF creator tool).</p>