Malicious PDF — malware analysis report

Heuristics 8

• 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.
• Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
  PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
• 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://krisoc.ru/uplcv?utm_term=protonvpn+android+tv PDF link annotation

  • http://www.haztartasigepszakuzlet.hu/pics/file/bowarujoritojoxulovulato.pdfIn PDF document text
  • https://sportsslife.net/upload/ckfinder/files/10667727212.pdfIn PDF document text
  • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16137477520f86---50344974671.pdfIn PDF document text
  • http://www.veslovani-vsb.cz/soubory/file/90589739808.pdfIn PDF document text
  • http://daltan.hu/userfiles/file/16482747477.pdfIn PDF document text
  • http://sissonne.hu/editor_up/94424324052.pdfIn PDF document text
  • http://kangshi-you.com/uploads/files/202109080715292123.pdfIn PDF document text
  • http://www.morrisjones.co.uk/EditorImages/file/14381196048.pdfIn PDF document text
  • http://namlinhchivietnam.net/userfiles/image/file/15440953606.pdfIn PDF document text
  • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/01b1f713ca7fb8bfb28b5ba835d6ccb8/gazejam.pdfIn PDF document text
  • http://ipcmanpower.com/admin/style/images/userfiles/file/41051677930.pdfIn PDF document text
  • https://vaynhanh365.net/contents/files/beliwogajemoputitozo.pdfIn PDF document text
  • http://yucehukuk.com/resimler/files/36019432741.pdfIn PDF document text
  • https://comfort8889.com/upload/files/xajopogudixawidugi.pdfIn PDF document text
  • https://joinvita.com/neu/userfiles/file/95025505549.pdfIn PDF document text
  • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/qh7o6pj8mi4mi7cdb1q9hdbhnf/kurebix.pdfIn PDF document text
  • https://calienglish.com/ckfinder/images_store/files/70492152899.pdfIn PDF document text
  • https://vnycc.com/userfiles/file/ruxiwopizaj.pdfIn PDF document text
  • https://piauiaqui.com/ckfinder/files/kulizej.pdfIn PDF document text
  • http://aromamahabaleshwar.com/ckfinder/userfiles/files/19839895299.pdfIn PDF document text
  • http://autoscuolauniversale.it/userfiles/files/zeleve.pdfIn PDF document text
  • https://spotiverify.com/ci/userfiles/files/wizopokidef.pdfIn PDF document text
  • http://travellightnepal.com/userfiles/file/59322759944.pdfIn PDF document text
  • http://lucidareemantenerepavimentifaidate.it/userfiles/files/fevolikik.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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