Malicious PDF — malware analysis report

Heuristics 9

• ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
  ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
• Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
  Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
• 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
• 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.
• Callback phishing phone lure medium SE_CALLBACK_LURE
  Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
• 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://trafffe.ru/aws?utm_term=chrome+for+windows+latest+version PDF link annotation

  • https://cdn-cms.f-static.net/uploads/4496148/normal_5fb3f66bb5513.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4373264/normal_5fb2d796b07b2.pdfIn PDF document text
  • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/lasezuvafuji_kabonudisa.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4417406/normal_5fb47e24d3465.pdfIn PDF document text
  • https://cdn-cms.f-static.net/uploads/4370268/normal_5fa9a99756a81.pdfIn PDF document text
  • https://dexetejitifite.weebly.com/uploads/1/3/4/5/134576896/xubarus-nojefuga-jesexin-fodewanemiwuxuz.pdfIn PDF document text
  • https://xotiroxo.weebly.com/uploads/1/3/0/7/130776105/8197103.pdfIn PDF document text
  • https://jotitotibewava.weebly.com/uploads/1/3/1/3/131383271/vuwemavepebovi.pdfIn PDF document text
  • https://penepanixefi.weebly.com/uploads/1/3/4/3/134354239/jevomefagaku.pdfIn PDF document text
  • https://ximazula.weebly.com/uploads/1/3/0/7/130738777/ad45c4622025.pdfIn PDF document text
  • http://www.ascendercorp.com/In PDF document text
  • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
  • https://uploads.strikinglycdn.com/files/b1743d77-1902-4fd1-a285-4cf1741d4ec4/xamanawuneninujaxojudata.pdfIn PDF document text
  • https://uploads.strikinglycdn.com/files/15a4281e-8c39-4b74-aef3-4f5bc0ce9ca3/espaol_telesecundaria_tercer_grado_volumen_1.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://scripts.sil.org/OFLIn PDF document text

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