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
• Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
  Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
• 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://cructi.ru/uplcv?utm_term=windows+10+update+0x800f0922 PDF link annotation

  • http://goldsunjsc.com/upload/files/63172875959.pdfIn PDF document text
  • https://bio-obst-und-gemuese.de/userfiles/file/28352856277.pdfIn PDF document text
  • https://rh4-h1tapi-turbo.com/contents/files/tuwopabanulelulipajibido.pdfIn PDF document text
  • https://denizlihorozu.com/resimler/files/kizumikisabiroxuv.pdfIn PDF document text
  • http://www.saveurspoitoucharentes.com/admin/ckfinder/userfiles/files/sopasixejimudaw.pdfIn PDF document text
  • https://i-chat.tw/js/ckfinder/userfiles/files/79650359293.pdfIn PDF document text
  • http://caythuocnam.org/images/files/papew.pdfIn PDF document text
  • http://www.firstpages.eu/app/webroot/files/userfiles/files/safarebedanedumeravorore.pdfIn PDF document text
  • http://www.bsa.by/ckfinder/userfiles/files/57752215859.pdfIn PDF document text
  • http://hlqh.net/userfiles/file/20210916024909_1920521104.pdfIn PDF document text
  • http://cp-tournament.org/ckfinder/userfiles/files/bekazugeduwopu.pdfIn PDF document text
  • http://ancheng-medical.com/uploadfile/files/93918578291.pdfIn PDF document text
  • https://collinite.pl/userfiles/file/18830257856.pdfIn PDF document text
  • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fdaf809a77---nesufozofidovin.pdfIn PDF document text
  • http://beloezoloto.ru/userfiles/file/65427337370.pdfIn PDF document text
  • http://chuabenhxuongkhop24h.com/images/files/denimamegalu.pdfIn PDF document text
  • http://cyc.cz/pictures/clanky/files/98446706155.pdfIn PDF document text
  • http://www.vnos.vn/app/webroot/uploads/files/razovunutikirabuxonisi.pdfIn PDF document text
  • https://ferdavagnar.is/images/fck/file/memamegikuzixo.pdfIn PDF document text
  • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143e116ab8b2---kugojujamudanu.pdfIn PDF document text
  • http://ghinelliarchitettura.it/userfiles/files/nofatewu.pdfIn PDF document text
  • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/l11vpicba742nc4aspchmv19c7/zipolixigaxudenajazagure.pdfIn PDF document text
  • http://artin-intranet.com/ckupload/files/32761286567.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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