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.
• Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
  A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
• 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.
• 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://chcial.ru/uplcv?utm_term=solved+problems+in+lagrangian+mechanics+pdf PDF link annotation

  • https://braveathlete.net/geektic/files/jaditubezimoto.pdfIn PDF document text
  • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614534f400733---vuzuve.pdfIn PDF document text
  • https://cantellodetersiviprofessionali.it/uploads/file/7557640163.pdfIn PDF document text
  • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16158413c1fb4f---43316946615.pdfIn PDF document text
  • http://atsolution.org/userfiles/file/20210914054657352767943.pdfIn PDF document text
  • https://812423.situshoki1.com/contents/files/54336203971.pdfIn PDF document text
  • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b695271d0c---sezimurawepawubiw.pdfIn PDF document text
  • http://www.ruben.pl/ckfinder/userfiles/files/7387735166.pdfIn PDF document text
  • http://smflow.in/admin/uploads/file/xaxafegiwegoka.pdfIn PDF document text
  • http://exoticland.bg/upload/files/files/14960509022.pdfIn PDF document text
  • http://photo-poligrafic.ru/ckfinder/userfiles/files/59468309561.pdfIn PDF document text
  • https://gsm.company/ckfinder/userfiles/files/38030121.pdfIn PDF document text
  • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615403ee23f22---30633215589.pdfIn PDF document text
  • http://www.moulbaix.be/fck/file/45110661289.pdfIn PDF document text
  • https://successalpha.team/upload/files/35628016734.pdfIn PDF document text
  • http://icaalliance.org/filespath/files/20210926114631.pdfIn PDF document text
  • https://rajaunited.com/contents/files/piwik.pdfIn PDF document text
  • https://thic.muki001.com/plugin/ce1/ckfinder/userfiles/files/dikosoxofawowezar.pdfIn PDF document text
  • https://traveletrust.com/basefile/traveletrustcom/files/59177888159.pdfIn PDF document text
  • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/161381f2a03fc9---77276216494.pdfIn PDF document text
  • http://poorclarescork.ie/images/sexux.pdfIn PDF document text
  • http://hyeminshop.com/DATA/files/zavokow.pdfIn PDF document text
  • http://ahppesticide.com/userfiles/file/bovilejazexilulavude.pdfIn PDF document text
  • https://thegmsbihta.in/userfiles/file/rowikizufaf.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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