Malicious PDF — malware analysis report

Heuristics 9

• 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.
• 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://cructi.ru/uplcv?utm_term=love+birds+2017+movie+watch+online PDF link annotation

  • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/k7tj6pjkosn6piofr93jdduar2/fatenepinegavagutil.pdfIn PDF document text
  • http://peetersinstallatietechniek.nl/upload/files/sojirejineligavubosus.pdfIn PDF document text
  • http://el-master.ru/userfiles/file/10162890081.pdfIn PDF document text
  • http://85560891.com/upfolder/e/files/20210912122303.pdfIn PDF document text
  • https://ssvacancy.com/ckfinder/userfiles/files/mibusiboxojerika.pdfIn PDF document text
  • http://daotaonhaccong.com/uploads/userfiles/file/89581753052.pdfIn PDF document text
  • https://stehovani-ostrava.cz/static_pages_files/file/47193030689.pdfIn PDF document text
  • http://www.temaricerca.com/entry2013new/admindia/ckfinder/userfiles/files/tifipojugifus.pdfIn PDF document text
  • http://clinicaveterinariamontecchia.com/userfiles/files/kulojugitekig.pdfIn PDF document text
  • http://jakpaisanestate.com/images/upload/files/dafuxudodepijof.pdfIn PDF document text
  • http://nhahanghienminh68.com/upload/files/34222193856.pdfIn PDF document text
  • http://school15-tyumen.ru/f/39390460818.pdfIn PDF document text
  • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/qetcp6d4vungqgr04ar0v77kvt/31271397821.pdfIn PDF document text
  • http://fuyu.010bi.com/ckfinder/userfiles/files/90150707631.pdfIn PDF document text
  • https://soudureornementalelauziere.com/upload/editor/file/641586996.pdfIn PDF document text
  • https://terracell.pt/images/file/63356608307.pdfIn PDF document text
  • http://saothienemb.com/uploads/images/files/taxare.pdfIn PDF document text
  • http://leprofit.ee/cmsfile/contentfiles/fapobenadugo.pdfIn PDF document text
  • http://ambulatorioveterinarioscapindandrea.it/userfiles/files/kijavatipegijemiguno.pdfIn PDF document text
  • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc73878da0---39503257363.pdfIn PDF document text
  • http://smarttechsolutionukltd.com/uploaded_files/userfiles/files/35053810529.pdfIn PDF document text
  • http://putzlappenborner.at/editor_up/fisupubixubojutovilutijud.pdfIn PDF document text
  • http://motoren-adachi.com/js/upload/files/41215385768.pdfIn PDF document text
  • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612efc8503b77---47170084589.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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