title: Python PyPdf 2: Returns empty result for some pdfs
body: <p>Hi I have some pdf's that I need to their text info to be extracted. I used the following code below: </p>
  
  <pre><code>pdfFileObj = open('abc.pdf', 'rb')
  pdfReader = PyPDF2.PdfFileReader(pdfFileObj)
  pageObj = pdfReader.getPage(0)
  pageObj.extractText()
  </code></pre>
  
  <p>But what I get is for a spesific pdf:</p>
  
  <p>'\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n'</p>
  
  <p>However this code works for some pdf's that I have. What could be the problem? 
  Thank you . </p>