Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3efd3a6b9fda110…

MALICIOUS

PDF

87.1 KB Created: 2021-10-08 08:53:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-21
MD5: 3cd9d2d188e224d1ccd2816df70e56ce SHA-1: f4b319871c69032cb375da5d5ff61e1101b15068 SHA-256: d3efd3a6b9fda1102cd84ccbf040bfc901519098baf829a4ffecc8a838d58b7e
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 6

  • 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 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://tomorrowhubs.com/upload/users/files/bakozalo.pdf In PDF document text
    • http://gemmacapitalgroup.com/foto/file/3553241898.pdfIn PDF document text
    • https://lochoanggia.com/upload/files/91367864244.pdfIn PDF document text
    • http://feg.vn/uploads/files/gowode.pdfIn PDF document text
    • https://santa.sg/images/users/00000000/files/rikos.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/25518721655.pdfIn PDF document text
    • http://chiaranannini.com/userfiles/files/51160410403.pdfIn PDF document text
    • http://mrpokedb.com/uploads/files/vevisesurinas.pdfIn PDF document text
    • http://huh.hu/UserFiles/File/fiturutizajez.pdfIn PDF document text
    • http://hfengly.dk/skoleportalen/userfiles/file/buxeso.pdfIn PDF document text
    • http://tamphuhiep.com/Images_upload/files/lunupigiwavafitanisaw.pdfIn PDF document text
    • http://daiichihr.com/uploads/news_file/netebatotimiti.pdfIn PDF document text
    • http://primeasset.hu/fileok/file/dakesuzofulogenes.pdfIn PDF document text
    • http://leaders-adv.net/userfiles/file/52435707798.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615c2459da18d---11557858265.pdfIn PDF document text
    • http://apnschool.in/singhania/downloads/file/58256645310.pdfIn PDF document text
    • http://maychaybocaocap.com/app/webroot/uploads/files/wupigukav.pdfIn PDF document text
    • http://studiodrago.eu/userfiles/files/wotebenojetimifufiparega.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/2d25218f39810b4b2ab7a392ac1c5c1d/63001105367.pdfIn PDF document text
    • http://mrybalko.ru/files/wogejo.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd15b7e09b---zegudukatobusuk.pdfIn PDF document text
    • http://khyljg.com/uploadfiles/files/navorose.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/files/21794152950.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=6+pack+abs+editorPDF link annotation
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC00 19376 bytes
SHA-256: 1533c11aedae8c80253311aec52faa48edac57198d8331627e4cafb206aabccb
font_01_sfnt_off00011e42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E42 10660 bytes
SHA-256: 6f8c1e919ac8f49535726c6acc24a9f744a2aada51668513eba148323e8ff648
font_02_sfnt_off0001369c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1369C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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