title: Qualified signature showing invalid only in Adobe Reader
body: <p>Here is PDF with qualified electronic signature <a href="https://www.dropbox.com/s/mgb7vzgi78wvbns/pdf-qualified-invalid.pdf?dl=0" rel="nofollow noreferrer">pdf-qualified.invalid.pdf</a></p>
  <p>All validation apps show it correct as PAdES-BASELINE-LT, however Adobe Reader shows it invalid. What is wrong with this digitally signed PDF?
  It includes CAdES-BASELINE-LT signature, all OCSPs, all needed Certs.</p>
  <p>Adobe reader shows its invalid</p>
  <p><a href="https://i.stack.imgur.com/swI6B.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/swI6B.png" alt="Adobe reader wrongly says invalid" /></a></p>
  <p>EU validation shows signature is valid at <a href="https://ec.europa.eu/cefdigital/DSS/webapp-demo/validation" rel="nofollow noreferrer">https://ec.europa.eu/cefdigital/DSS/webapp-demo/validation</a></p>
  <p><a href="https://i.stack.imgur.com/1S73G.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/1S73G.png" alt="EU validator shows valid" /></a></p>
  <p>DigiDoc4 app shows signature is valid</p>
  <p><a href="https://i.stack.imgur.com/RHtg4.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/RHtg4.png" alt="DigiDoc4 shows valid" /></a></p>
  <p><a href="https://www.eparaksts.lv/" rel="nofollow noreferrer">https://www.eparaksts.lv/</a> shows it is valid</p>
  <p><a href="https://i.stack.imgur.com/Gcrzt.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Gcrzt.png" alt="eparaksts.lv shows valid" /></a></p>
  <p>Here we can see the PDF structure related to the digital signature</p>
  <p><a href="https://i.stack.imgur.com/uxH7b.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/uxH7b.png" alt="iText Rups shows all needed components there" /></a></p>