Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4177adead278a07…

MALICIOUS

PDF

68.2 KB Created: 2021-02-26 16:43:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: ec8dc691ade19a3adfce0f3f86b4f65c SHA-1: 680bbde8b709c474726a5d4edb6aea2a565b0de3 SHA-256: a4177adead278a07b1d5f1e46e8f301b7bb6c3c1df4bd1439a14ec5f549feb77
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with a high concentration on disposable hosting and link farm patterns, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to harmful 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://xezojetit.ru/123?utm_term=ga+1000+module+5302 PDF link annotation
    • https://cdn.sqhk.co/nugofonavuf/zWLjdtE/best_offline_games_free_for_pc.pdfIn PDF document text
    • https://vaferevipesefur.weebly.com/uploads/1/3/0/9/130969420/9c1f2b2a5cd9543.pdfIn PDF document text
    • http://jozejibojofeku.22web.org/vikunosamedenesizefefofu.pdfIn PDF document text
    • https://lizodeva.weebly.com/uploads/1/3/5/3/135342900/zafatemas.pdfIn PDF document text
    • http://veruvipavopa.getenjoyment.net/wanepozon.pdfIn PDF document text
    • https://nodejobirutita.weebly.com/uploads/1/3/4/7/134748641/917cd7a.pdfIn PDF document text
    • https://cdn.sqhk.co/vusabutam/zxichcc/film_premieres_today.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/stage_1_early_rheumatoid_arthritis_in_hands_treatment.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409098/normal_602257816567a.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvisisitinu/8oihJhb/84542240208.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385887/normal_600c899761f40.pdfIn PDF document text
    • https://cdn.sqhk.co/wojipezusax/halJcZV/dipizefabi.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/betefowubevat/label_water_cycle_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/29200103727.pdfIn PDF document text
    • https://s3.amazonaws.com/jifedefujodu/2633529992.pdfIn PDF document text
    • http://ruxomipeb.epizy.com/year_6_long_division_worksheets.pdfIn PDF document text
    • http://nufiwimuzobo.onlinewebshop.net/52044982442.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_off0000c9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9DE 5340 bytes
SHA-256: 1fa647c00ca328f56df63da16323d96021bb6845525b9a40d0993c83b6948375
font_01_sfnt_off0000dc05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC05 11224 bytes
SHA-256: 5bc2cb8c68d6ac903e0bf8ffd488502ea0eea11b63bacb67b01cd7363ff75970

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