Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ef2f6d963f4692a…

MALICIOUS

PDF

66.4 KB Created: 2021-02-19 02:06:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: eda078698e3f21ff01f7723d6ad49a63 SHA-1: 4f6a4fc506e35d2e3dc4c864bb16befae336bc70 SHA-256: 4ef2f6d963f4692a47668c8b129982c0f054d54158032ed040646679b9f3c3ca
126 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is a link farm and has been flagged by a machine learning classifier and ClamAV as malicious. The embedded URL, 'https://seumenha.ru/123?utm_term=what+accounts+is+closed+to+income+summary', is likely the primary objective, aiming to redirect the user to a malicious site. Although no scripts were explicitly extracted, the PDF structure and the nature of the heuristics suggest it's designed to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/123?utm_term=what+accounts+is+closed+to+income+summary PDF link annotation
    • https://cdn.sqhk.co/gasalikuviz/jfhajgm/nimopetujufagurezejuramoz.pdfIn PDF document text
    • http://gonugotez.22web.org/xumugoduvubojuzagoga.pdfIn PDF document text
    • http://gukapeb.iblogger.org/fovujavudijom.pdfIn PDF document text
    • https://cdn.sqhk.co/foroboreb/j3Pgfit/liam_neeson_gangs_of_new_york_quotes.pdfIn PDF document text
    • https://cdn.sqhk.co/fekigimuzib/yvgchdW/halloween_costume_ideas_college_pinterest.pdfIn PDF document text
    • http://nicepics.xyz/wazuniserqu8w.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/austin_airport_food_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/jubufukomususuwakixoko.pdfIn PDF document text
    • http://roweviwumi.epizy.com/aashiqui_2_movie_songs_naa_songs._com.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/bitumen_roof_sheets_b_q.pdfIn PDF document text
    • http://miwufojo.epizy.com/bitomaruselabemapavumib.pdfIn PDF document text
    • http://zufagubiles.epizy.com/21915066502.pdfIn PDF document text
    • http://rukukuwozar.epizy.com/vuvamopusawegegipejamego.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/roziwafiseribifogujopesaf.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_off0000c7d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D3 5292 bytes
SHA-256: 4eedc19985a78ce0c4f5e1a37440299b7f9645432cb2432afd88e7c1e217859b
font_01_sfnt_off0000d9b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B6 10256 bytes
SHA-256: a950450a090f4fc38ec316cc6a540f91104c8bd5311f3f5d6e417922b34f2d41

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