Malicious PDF — malware analysis report

Heuristics 7

• ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
  ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
• PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
  PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
• PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
  PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
• Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
  Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
• External URI info PDF_URI
  PDF contains an external URL action
• Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
  The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
• 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 https://cructi.ru/uplcv?utm_term=famous+game+in+2021 PDF link annotation

  • http://jandebruijn.com/uploadimages/files/37961075797.pdfIn PDF document text
  • http://nofatrans-int.com/userfiles/file/57521360244.pdfIn PDF document text
  • http://mcenterdk.ru/fck_editor_files/files/54615977339.pdfIn PDF document text
  • https://iqrainternationalschool.org/_assets/files/65073474499.pdfIn PDF document text
  • https://tallerescarrion.com/uploads/file/pininude.pdfIn PDF document text
  • http://chinhsuasolieu.com/media/files/36876894670.pdfIn PDF document text
  • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613a1888899eb---xusaripojukil.pdfIn PDF document text
  • http://zeroseistudio.eu/userfiles/files/mujunopakoje.pdfIn PDF document text
  • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/cda036d20b7ef64cbc8879ecdab73704/nodenamerizatib.pdfIn PDF document text
  • http://condominiobrisasdelnorte.com/userfiles/file/2164433011.pdfIn PDF document text
  • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e47620f2fe---jawuveritoresewago.pdfIn PDF document text
  • http://edins.net/userData/ebizro_board/file/55596942183.pdfIn PDF document text
  • http://thcscatquea.hoaiduc.edu.vn/ckfinder/userfiles/files/zovif.pdfIn PDF document text
  • http://salt17.com/userfiles/files/67035173901.pdfIn PDF document text
  • http://selidbe-beograd.info/files/ximijivirovuleziteloge.pdfIn PDF document text
  • https://rumusjitu.com/contents/files/5456781693.pdfIn PDF document text
  • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/4bcd340e0d3d3b6e586134d8889ebe8a/soraruxuwelapibip.pdfIn PDF document text
  • https://ambulatorioveterinariosismondi.eu/file/34155876400.pdfIn PDF document text
  • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/16306571463575.pdfIn PDF document text
  • https://hotararicedo.ro/files/files/vorutir.pdfIn PDF document text
  • http://760_709737661.mildmedia-dev.eu/uploads/userfiles/files/43372751452.pdfIn PDF document text
  • http://cluster006.ovh.net/~greeters/be/ckfinder/userfiles/files/50641266945.pdfIn 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/pdf/1.3/In PDF document text
  • http://ns.adobe.com/xap/1.0/In PDF document text
  • http://ns.adobe.com/xap/1.0/mm/In PDF document text
  • http://ns.adobe.com/xap/1.0/rights/In PDF document text
  • http://dejavu.sourceforge.netIn PDF document text
  • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

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