Malicious PDF — malware analysis report

Heuristics 5

• Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
  Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
• Cracked-software lure uses shortlink/download gateway critical PDF_CRACKED_SOFTWARE_SHORTLINK_LURE
  PDF visible text advertises a crack, serial number, archive, or pirated-software download and pairs it with a shortlink or encoded download gateway. This is a high-confidence social-engineering carrier for unwanted software or droppers; the PDF itself is not a parser exploit.
• PDF links to a cracked-software download doorway (base64-obfuscated) high PDF_CRACKED_SOFTWARE_DOWNLOAD_DOORWAY
  PDF's embedded link hides a pirated-software title as a base64 blob inside the URL path/query (and/or carries the ``download|`` doorway-template marker), rather than in visible text. This is a TCPDF-generated SEO doorway that ranks for software-piracy searches and funnels users to fake 'crack/keygen' download pages distributing adware, potentially-unwanted programs, or droppers. The base64 encoding is deliberate obfuscation to evade plaintext lure rules; the PDF itself carries no parser exploit — the risk is the linked crack-download destination.
• External URI info PDF_URI
  PDF contains an external URL action
• Embedded URL info EMBEDDED_URL
  One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
  URL http://signforcover.com/misdiagonosed/chestnuts/comets.fern/misbehaved/ZG93bmxvYWR8OFl3YTJnNVlYeDhNVFkxTmpjM01UZ3hPSHg4TWpVNU1IeDhLRTBwSUZkdmNtUndjbVZ6Y3lCYldFMU1VbEJESUZZeUlGQkVSbDA/plummer/ipratropium/QWRwLTMwMCBQcmludGVyIERyaXZlciBEb3dubG9hZAQWR PDF link annotation

  • https://customaffiliations.com/wp-content/uploads/2022/07/solution_of_differential_calculus_by_das_and_mukherjee_pdf_1-1.pdfIn PDF document text
  • https://followgrown.com/upload/files/2022/07/FHlrKeNn9ZYcnT9tAcvr_03_3801cf4ab2dc514a4e2d5db2a41e808f_file.pdfIn PDF document text
  • https://ejenvie.com/wp-content/uploads/2022/07/Solucionario_De_Principios_De_Electronica_Malvino_Sexta_Edic.pdfIn PDF document text
  • https://taxi2b.social/upload/files/2022/07/K89wACP9gBlivQEmQCeo_03_91c4015e05f8dd3141b9f463244009ac_file.pdfIn PDF document text
  • https://losoxla.net/descargar-planilla-de-pago-del-seniat-forma-33/In PDF document text
  • https://www.gcpl.net/sites/default/files/webform/resume/hananna32.pdfIn PDF document text
  • https://www.cameraitacina.com/en/system/files/webform/feedback/laucla448.pdfIn PDF document text
  • https://blu-realestate.com/wondershare-data-recovery-420-serial-keyrar-free/In PDF document text
  • https://cell.foundation/sites/default/files/webform/seapri454.pdfIn PDF document text
  • http://oag.uz/?p=24740In PDF document text
  • http://myquicksnapshot.com/?p=17937In PDF document text
  • https://www.londonderrynh.org/sites/g/files/vyhlif4616/f/agendas/rfq_newpaper_notice.pdfIn PDF document text
  • https://www.iltossicoindipendente.it/2022/07/03/geografia-fisica-ita-strahler-pdf-new/In PDF document text
  • https://www.newtown-ct.gov/sites/g/files/vyhlif3546/f/uploads/newtown_charter_2016_5.5x8.5_12-16_0.pdfIn PDF document text
  • https://www.condommessage.com/wp-content/uploads/2022/07/orofri.pdfIn PDF document text
  • http://montehogar.com/?p=27646In PDF document text
  • https://followgrown.com/upload/files/2022/07/ZiHloGfu9QUXdjNXUlew_03_91c4015e05f8dd3141b9f463244009ac_file.pdfIn PDF document text
  • https://electricnews.fr/wp-content/uploads/2022/07/El_Rumor_De_Las_Piedras_Dvdrip_2021_Download.pdfIn PDF document text
  • https://www.ecyacg.net/wp-content/uploads/2022/07/Hard_Disk_Recovery_Torrent.pdfIn PDF document text
  • https://prendimisubito.com/wp-content/uploads/2022/07/Bajar_Libro_Gratis_Ingles_Basico_A_Ghio_D.pdfIn PDF document text
  • http://signforcover.com/misdiagonosed/chestnuts/comets.fern/misbehaved/zg93bmxvywr8ofl3ytjnnvlyedhnvfkxtmpjm01uz3hpshg4twpvnu1iedhlrtbwsuzkdmntundjbvz6y3lcyldfmu1vbejesuzzeulgqkvsbda/plummer/ipratropium/qwrwltmwmcbqcmludgvyieryaxzlcibeb3dubg9hzaqwrIn PDF document text
  • http://www.tcpdf.orgIn PDF document text
  • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
  • http://purl.org/dc/elements/1.1/In PDF document text
  • http://ns.adobe.com/xap/1.0/In PDF document text
  • http://ns.adobe.com/pdf/1.3/In PDF document text
  • http://ns.adobe.com/xap/1.0/mm/In PDF document text
  • http://www.aiim.org/pdfa/ns/extension/In PDF document text
  • http://www.aiim.org/pdfa/ns/schema#In PDF document text
  • http://www.aiim.org/pdfa/ns/property#In PDF document text
  • http://www.aiim.org/pdfa/ns/id/In PDF document text

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