Malicious PDF — malware analysis report

Heuristics 8

• ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
  ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
• 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.
• Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
  Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
• 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://crysiq.ru/uplcv?utm_term=group+d+all+shift+paper+pdf

  • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d65f5d37a1a---jewupesi.pdf
  • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/sr04u5053o44ketd4g37a60ng6/76321447049.pdf
  • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6af8dceae---34462252833.pdf
  • http://poltinka.ru/userfiles/file/nagedewupigurapilaz.pdf
  • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb26723730---21277278020.pdf
  • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609ffcee2eb45---vabolapulosukerajegiko.pdf
  • http://przedszkolenisko.pl/userfiles/file/bebaja.pdf
  • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/61p6rpt4m9lb9so78bv1is7771/9177056013.pdf
  • http://change4best.ru/upload/file/mevutivuzuzeno.pdf
  • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/5638dd3c13910905ccba36846ab25008/zavusitilazat.pdf
  • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bd527535b2b---gesab.pdf
  • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2f0e51e733---42484858636.pdf
  • http://melly-incendie.fr/img_db/jiwetilulibegoribikezafut.pdf
  • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b97a552eb5e---77699961261.pdf
  • http://ttccid.com/userfiles/file/58865766439.pdf
  • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/edaab1ac9020d5c5b180178e6bbb0910/66754645833.pdf
  • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16093f951e5834---24310648795.pdf
  • http://asupuro.com/user_data/image//file/mubepirapuwuve.pdf
  • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/7ofsoqf0b965lhcd3q43dqhamu/teziwudorijuv.pdf
  • http://alexhofford.com/temp/files/file/69085798823.pdf
  • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160ce8f3066b29---31082933996.pdf
  • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/438ef16e7d2f6e5486318c59da76a149/99488487737.pdf
  • https://actor-conseil.com/files/file/pulanuxibutenav.pdf
  • http://sl-light.ru/design/img/upload/file/14329859171.pdf
  • https://pjkconstruction.ca/images/file/rovofagosuxozoxosut.pdf
  • http://maciejabramowicz.pl/upload/files/file/50362330371.pdf
  • http://www.w3.org/1999/02/22-rdf-syntax-ns#
  • http://purl.org/dc/elements/1.1/
  • http://ns.adobe.com/pdf/1.3/
  • http://ns.adobe.com/xap/1.0/
  • http://ns.adobe.com/xap/1.0/mm/
  • http://ns.adobe.com/xap/1.0/rights/
  • http://dejavu.sourceforge.net
  • http://dejavu.sourceforge.net/wiki/index.php/License

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