title: Copy+pasting text from PDF results in garbage
body: <p>I am writing a Master's thesis - NLP system. I have one component - extractor. </p>
  
  <p>It is extracting a plain text from PDF files. There are a few PDF files that can not be extracted correctly. Extractor (PDFBox library) returns a string like this:</p>
  
  <blockquote>
    <p>"┤xDn║if|d├gDF"Ti&amp;cD╬lh  d FÁhis~n ╗xd f«"d┤ffih »h" </p>
  </blockquote>
  
  <p>or</p>
  
  <blockquote>
    <p>"10a61a91a22a25a3a27a17a23a20a8a13a14a61a25a17"</p>
  </blockquote>
  
  <p>I was checking each file that makes this extraction's problem and all these files' text also can not be copy-pasted from PDF Reader (Adobe Reader and FoxIt reader). Viewing them in this readers is enabled, but after selecting its content and copying to the clipboard I get the same wrong text (as described above - strings of not semantically correct chars or strings of digits and letters).</p>
  
  <p>Could anybody help me???</p>