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://philabc.ru/uplcv?utm_term=hard+gcse+maths+questions+pdf PDF link annotation

  • http://dentalclinicbangalore.com/uploads/lemikidi.pdfIn PDF document text
  • http://docando.es/js/ckfinder/userfiles/files/91563599750.pdfIn PDF document text
  • http://immopolignano.lu/images/jirobozikunen.pdfIn PDF document text
  • https://adverto.ee/userfiles/file/nefusoxedesamogojupedese.pdfIn PDF document text
  • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/ea90b3b5f71a676b89f011d8ba56a939/94265959269.pdfIn PDF document text
  • https://vanchuyenduongsat.vn/upload/files/27961843470.pdfIn PDF document text
  • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a960ee09365.pdfIn PDF document text
  • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/bf1dc76ddbb6c6d8ecc67829a50a5012/24902970579.pdfIn PDF document text
  • https://cantellodetersiviprofessionali.it/uploads/file/kujilugukamejoderiko.pdfIn PDF document text
  • http://onlinevay.com/upload/files/walab.pdfIn PDF document text
  • http://guerrazzi.info/userfiles/files/pevututarasanixana.pdfIn PDF document text
  • https://propiedades.net/ckfinder/userfiles/files/53710624029.pdfIn PDF document text
  • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4be077bc74---6297815874.pdfIn PDF document text
  • http://mkconline.com/landmark/ckfinder/userfiles/files/12511169979.pdfIn PDF document text
  • http://jumpinfit.it/userfiles/files/pilesifusadafet.pdfIn PDF document text
  • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/l41c8qg00f5jh274prglau3vh5/zupiripokukejo.pdfIn PDF document text
  • http://orem.mn/uploads/files/96604742785.pdfIn PDF document text
  • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/9c23f8f7c0f761179c23a9cd866ae6ea/84118040767.pdfIn PDF document text
  • https://kristaldicarlo.com/userfiles/file/jopifitajamavolofozepeda.pdfIn PDF document text
  • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086aa5acb317---tusive.pdfIn PDF document text
  • http://vhshf.de/File/72066300068.pdfIn PDF document text
  • https://balaji-technology.com/userfiles/file/lovivitexufixevuvoxaruven.pdfIn PDF document text
  • https://mygo.com/ckfinder/userfiles/files/fetenofulizejefopowita.pdfIn PDF document text
  • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16080a8b690ba9---rijejofenajuxoxeji.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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