chromium/chrome/test/data/pdf/accessibility/blank_image-expected-with-pdfocr.txt

pdfRoot 'PDF document containing 1 page'
  banner
    status 'This PDF is inaccessible. No text extracted'
      staticText 'This PDF is inaccessible. No text extracted'
  region 'Page 1'
    paragraph
      image 'Unlabeled image'