Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d4e34b9c4956cd7…

MALICIOUS

PDF

78.6 KB Created: 2021-02-06 23:11:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 96301cf33b96a9c0713eb8d9eb9960e1 SHA-1: cb247be4fd5e281bb85f4f19be8669b3f63c62b8 SHA-256: 3d4e34b9c4956cd7eabc8502270424188adffffa68523f5185f20239e6c894c0
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links pointing to other PDF files hosted on disposable domains, a technique often used for SEO spam or phishing campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and extensive link farm suggest it's designed to redirect users to malicious content, potentially leveraging embedded JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://bologen.ru/123?utm_term=public+speaking+worksheets PDF link annotation
    • https://cdn.sqhk.co/gobuwovuv/fzjdibd/nekikozowuxanexuwo.pdfIn PDF document text
    • https://wifovusu.weebly.com/uploads/1/3/4/3/134312249/dajonapexexom.pdfIn PDF document text
    • https://lurevovikofa.weebly.com/uploads/1/3/4/6/134693735/8598109.pdfIn PDF document text
    • https://cdn.sqhk.co/seseniluvus/gQibuib/star_wars_hyperspace_mountain_disneyland_paris_review.pdfIn PDF document text
    • https://buranujepexu.weebly.com/uploads/1/3/4/3/134339299/1061202.pdfIn PDF document text
    • https://cdn.sqhk.co/favejofu/GIbjdLA/top_10_music_charts_this_week_uk.pdfIn PDF document text
    • https://jagunafine.weebly.com/uploads/1/3/4/3/134363358/9346331.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/MpjOPie/woruvitepefafokedorixulek.pdfIn PDF document text
    • https://letavozogat.weebly.com/uploads/1/3/5/9/135978758/saxofirupefud_kurekeg_kapidisaruw.pdfIn PDF document text
    • https://fidimamafiw.weebly.com/uploads/1/3/4/6/134624465/730e38.pdfIn PDF document text
    • https://redulexaxoxega.weebly.com/uploads/1/3/0/8/130874010/3335577.pdfIn PDF document text
    • https://xonifosanonozo.weebly.com/uploads/1/3/2/6/132680915/fuweguga_jasidedupiw_pusowito_xolunatupebusim.pdfIn PDF document text
    • https://bipewajebij.weebly.com/uploads/1/3/2/7/132740639/b0712.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kopivenegi.epizy.com/zotejovidofezudo.pdfIn PDF document text
    • http://gofosuxubajo.epizy.com/pigeguxepikezanituzisa.pdfIn PDF document text
    • http://zetiguseje.rf.gd/full_contact_details_template.pdfIn PDF document text
    • http://rasunafosav.epizy.com/verore.pdfIn PDF document text
    • https://s3.amazonaws.com/jiguwuzobozobaz/dulofibanoze.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F7 5492 bytes
SHA-256: ca1bc123fd0034cf7a389a96d7bb7cbdce6abeab087b957efd06d586e958e3bc
font_01_sfnt_off000109b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B2 10456 bytes
SHA-256: 39f1dbfbcd5609202fe5707c42273ca6207d168185774883756a8cb9faef8c82

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