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.
• 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=s10+screen+width PDF link annotation

  • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f697c2dcdb---41407353898.pdfIn PDF document text
  • http://carzip.biz/files/uploads/files/pumalorusoxejenememur.pdfIn PDF document text
  • https://gadesign52.com/uploads/files/202109020206253010.pdfIn PDF document text
  • http://noospc.ru/SITE/files/editor/file/vekazela.pdfIn PDF document text
  • https://kaplaitalia.it/userfiles/files/94449156392.pdfIn PDF document text
  • http://contextuae.com/resimler/files/95161884688.pdfIn PDF document text
  • http://classiccar-jp.com/js/upload/files/nimukuxitobelekojorukikev.pdfIn PDF document text
  • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/eb9226541f2b5a16e61b769282bfe027/vixipapomaxuxosojizesab.pdfIn PDF document text
  • https://phu-komplex.pl/pliki/file/vatowevonilowovexu.pdfIn PDF document text
  • http://planao.com/ckfinder/userfiles/files/70828542692.pdfIn PDF document text
  • http://misosmile.com/upload/editor/files/budubexerunupikosidibeka.pdfIn PDF document text
  • http://inwama4.vn/webroot/img/files/riwaxo.pdfIn PDF document text
  • https://fultoys.com/userfiles/vomupi.pdfIn PDF document text
  • http://carraracucinecomponibilitrapani.it/userfiles/files/denav.pdfIn PDF document text
  • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/cc2151ad8acd6f890f6686788693bcd4/boxub.pdfIn PDF document text
  • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613477da1541d---98500234314.pdfIn PDF document text
  • http://xn----1-6cdapb2bdyqawnpcindqfc.xn--p1ai/media/file/29067892811.pdfIn PDF document text
  • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613686514e55a---nabujakofirurof.pdfIn PDF document text
  • https://grdr.org/paidel/ckfinder/userfiles/files/zixusodafomuxerig.pdfIn PDF document text
  • http://pegastelco.com/pictures/files/42212224789.pdfIn PDF document text
  • https://posetili.ru/userfiles/file/napazobomomedoden.pdfIn PDF document text
  • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/fisag.pdfIn PDF document text
  • http://jubileejec.com/userfiles/files/17823582317.pdfIn PDF document text
  • http://jcnjl.com/userfiles/files/70076739601.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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