Malicious PDF — malware analysis report

Static analysis result for SHA-256 478c3b5cfcc52fa7…

MALICIOUS

PDF

77.2 KB Created: 2021-09-19 16:59:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-20
MD5: 46cc2414effb49d46d4aa7bb69f2e1bb SHA-1: 66f436ca14ab84e332846edb742fb31250b6b3ff SHA-256: 478c3b5cfcc52fa79b14f98dbbdfd9953328d8ad5716ad40426089f55519dda7
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/916a0e32fe717819663538a692edf029/kedufakipozodu.pdf In PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/04be77c228533467f9393c8b3cd6754d/bapaboponu.pdfIn PDF document text
    • https://laps.pl/userfiles/file/24099844836.pdfIn PDF document text
    • https://giaiphapthietke.vn/media/file/files/netalupitulubalewudevoga.pdfIn PDF document text
    • https://quangcaomattroi.com/uploads/news_file/zalemefekovapapalozijuse.pdfIn PDF document text
    • http://china-engine.net/ckfinder/userfiles/files/190099957.pdfIn PDF document text
    • https://petikdaun.com/contents/files/dovub.pdfIn PDF document text
    • http://mhinflatable.com/upload/file/66050374051.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/r38cfg0k1tq81bl8eqa0t4foa0/7647198314.pdfIn PDF document text
    • http://smart.sut.ac.th/tsme/src/lib/ckfinder/userfiles/files/32628635893.pdfIn PDF document text
    • http://billagelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/72622758142.pdfIn PDF document text
    • http://www.plain-pied.com/editeur/ckfinder/userfiles/files/41894023221.pdfIn PDF document text
    • https://tcremich.lu/files/files/dupetipomosefi.pdfIn PDF document text
    • https://xylemleads.com/userfiles/file/80766193014.pdfIn PDF document text
    • http://gzhangqin.com/uploadfile/files/ragezinimiremonume.pdfIn PDF document text
    • https://kotypsy.pl/ckfinder/userfiles/files/70535833048.pdfIn PDF document text
    • http://mail.me.ntou.edu.tw/ckfinder/userfiles/files/20210915_182627.pdfIn PDF document text
    • http://sieuthicayxanh.vn/webroot/img/files/91466416404.pdfIn PDF document text
    • http://artgrafika.cz/userfiles/file/vaxiguxixaveretol.pdfIn PDF document text
    • https://12shio2.com/contents/files/powekuvezamoraga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=superheroes+live+wallpaperPDF 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_off0000ca4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA4A 10472 bytes
SHA-256: e15dfe76b7118adbfa1b8c2d0abafb39bf0a0d083f14c2e0a6e3f9b0267ab849
font_01_sfnt_off0000e231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE231 17400 bytes
SHA-256: 7ad4626fb3f237e17b105e6e28f1ebc5124a169d8ca91f66ab57997111dbb832
font_02_sfnt_off00010f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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