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.
• 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.
• Embedded JS stream low PDF_JS
  PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
• 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://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c79e603ff53---63335915799.pdf In PDF document text

  • https://fenicia.uy/fenicia.com.uy/uploads/files/51810044056.pdfIn PDF document text
  • https://pk-kuepfer.ch/ckfinder/userfiles/files/51067719713.pdfIn PDF document text
  • http://dade666.com/userfiles/202106file/2021062317020770554.pdfIn PDF document text
  • http://vhshf.de/File/80271369563.pdfIn PDF document text
  • https://sfasg.jp/js/ckfinder/userfiles/files/puxikovibode.pdfIn PDF document text
  • https://avonsteel.com/UserFiles/file/wabowenofikum.pdfIn PDF document text
  • http://aquamedia.cn/ckfinder/userfiles/files/855945355.pdfIn PDF document text
  • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160f0e16ede82f---98400689262.pdfIn PDF document text
  • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/09bb100fc3e4d080a78528c6ff1fb613/63612896970.pdfIn PDF document text
  • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/f62ea2f7d1046dfd3a155d03ea9272fc/12378273096.pdfIn PDF document text
  • http://4grd.com/cmsimages/file/90984590697.pdfIn PDF document text
  • http://papinchess.ru/userfiles/file/zoluwebewojetabu.pdfIn PDF document text
  • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/2c1f0467e7a87444ef330d53c8c16ec6/75524239116.pdfIn PDF document text
  • http://carneiro-sa.pnh.pt/js/ckfinder/userfiles/files/fadofudilumela.pdfIn PDF document text
  • http://ambulatorioveterinariovianello.eu/userfiles/files/38703695209.pdfIn PDF document text
  • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/8dc2e8a39eea5342f58e810fbc7d8af8/vexajube.pdfIn PDF document text
  • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16073d4f71f3c8---sirevomulipokoremodalap.pdfIn PDF document text
  • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/3ea2b953662b2dd5aa92fc50e577f48f/faxatojixedora.pdfIn PDF document text
  • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071500d35a26---tikasadopov.pdfIn PDF document text
  • http://theemasternetworker.com/ckfinder/userfiles/files/84620790849.pdfIn PDF document text
  • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=1st+grade+math+fun+worksheets+freePDF link annotation
  • 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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