Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4fb35aa7de59fdc…

MALICIOUS

PDF

174.8 KB Created: 2022-04-02 20:45:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-01
MD5: 6c68f0787d4595cc3a4f9df6572f6ffd SHA-1: 2a6f0de9bc2a9e90779e7e1f4303ba0df1da0f97 SHA-256: a4fb35aa7de59fdc47f765914d5fd1d1dbd66ac5807155677b7cb409f057e59b
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 5

  • 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 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://yoyep.co.za/YmrXLWy8?keyword=por%20que%20es%20importante%20la%20administracion%20en%20enfermeria PDF link annotation
    • http://sinhorelli.com/userfiles/file/17796939806.pdfIn PDF document text
    • http://www.superprzygoda.pl/galeria/files/rilaxukuxuxulap.pdfIn PDF document text
    • https://roxracing.eu/userfiles/file/donejirukuvog.pdfIn PDF document text
    • https://jexujomasok.weebly.com/uploads/1/3/5/3/135343442/f478ef366d56fc4.pdfIn PDF document text
    • https://funstoreus.dialog.org/userfiles/file/60038057075.pdfIn PDF document text
    • https://soresewo.weebly.com/uploads/1/3/1/0/131069968/xujefujemokop.pdfIn PDF document text
    • http://www.alm-machines.be/kcfinder/upload/files/marezofukedomob.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16216981249be6---95211872280.pdfIn PDF document text
    • http://maxgear.cz/webpagebuilder/ckfinder/userfiles/files/4246437369.pdfIn PDF document text
    • https://fr.unecol.com/uploads/kcfinder/upload/files/38171118966.pdfIn PDF document text
    • http://www.perchegouet.com/ckfinder/userfiles/files/36378359307.pdfIn PDF document text
    • https://zitudoxe.weebly.com/uploads/1/3/1/4/131437236/cfcf01ab5.pdfIn PDF document text
    • http://spy-military-labs.com/userfiles/file/gosop.pdfIn PDF document text
    • https://textosl.com/upload/editor/file/wafekibedebopobefubapa.pdfIn PDF document text
    • https://fetezubusob.weebly.com/uploads/1/3/2/6/132681625/859139fa.pdfIn PDF document text
    • https://bafikesixetiv.weebly.com/uploads/1/3/4/5/134506736/fe87e57ceb.pdfIn PDF document text
    • http://www.octopus-quatuorvocal.com/ckfinder/userfiles/files/jasorabitirojofan.pdfIn PDF document text
    • https://pojekemo.weebly.com/uploads/1/3/4/4/134469054/5c9246167f6222.pdfIn PDF document text
    • http://hljxt.com/upload_files/file/220321211145079174vnnv34.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 extracted file (font_00_sfnt_off00024819.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00024819.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24819 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00026030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26030 11028 bytes
SHA-256: a9cac7936448c05040489785472b514c965242e959033a330d2e7689d4710654
font_02_sfnt_off0002799f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2799F 19060 bytes
SHA-256: a45eb22ac235a751cd7f14cf3aa35ca46ce66a027dce8ec486572b7be81f8171