Malicious PDF — malware analysis report

Static analysis result for SHA-256 b658f910342af5b6…

MALICIOUS

PDF

67.9 KB Created: 2021-02-28 05:23:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 1684d41bcfc2b6abf76ae252f197d8bd SHA-1: 0a3cdd367e5da727ac5e555fe80d97ba2cfb4432 SHA-256: b658f910342af5b646819fc8bfa1bc216caa56f4f8ce98f1f48e8b29e3e62349
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. The document body, though heavily obfuscated, contains text related to downloading a manifesto, and numerous URLs are embedded, suggesting a phishing or malware distribution attempt. The presence of external URIs and a link farm heuristic indicates an effort to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://resalured.ru/award?keyword=unabomber+manifesto+pdf+download PDF link annotation
    • http://xofebuledat.scienceontheweb.net/soxafesepetakofa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463529/normal_601bcd3c1c857.pdfIn PDF document text
    • https://sizojupitad.weebly.com/uploads/1/3/4/3/134332657/9890909.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409110/normal_5febdecea3833.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413697/normal_5fe91bb2a53af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501996/normal_5ff20f968b16f.pdfIn PDF document text
    • http://nout-prokat.website/domino_s_village_roadi51oy.pdfIn PDF document text
    • http://sokixatov.mywebcommunity.org/python_pandas_tutorial_for_beginners_youtube.pdfIn PDF document text
    • http://italdom.fun/final_fantasy_iii_nes_vs_dsysf9k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365636/normal_5ff01777b47e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447087/normal_5fe20efe12c72.pdfIn PDF document text
    • https://pawigesi.weebly.com/uploads/1/3/5/3/135389203/pozoxuxasafaraj_mukapivig_dojoxawififuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481408/normal_6010c72738d01.pdfIn PDF document text
    • http://igbusinessabouthelp.com/kipaxarumaknd7ay.pdfIn PDF document text
    • http://lozipazom.sportsontheweb.net/48998349688.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425209/normal_602752b698367.pdfIn PDF document text
    • https://linerebe.weebly.com/uploads/1/3/0/8/130813546/vavetijavisejajuxela.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487625/normal_600a0c71c89a5.pdfIn PDF document text
    • https://wefakibulebu.weebly.com/uploads/1/3/1/4/131408371/jatarado_rovutonuloguveb.pdfIn PDF document text
    • https://bevikafu.weebly.com/uploads/1/3/4/7/134710030/6873476.pdfIn PDF document text
    • http://fallofelin.online/48300266894oinmo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zesafemumibow.myartsonline.com/how_to_use_pictochat_on_ds_lite.pdfIn PDF document text
    • http://gupatevefojip.myartsonline.com/how_to_tighten_chain_on_stihl_ms_170.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_off0000caf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF0 5412 bytes
SHA-256: 376517a195a8f8a640ee3429e7d9893f1684e4f77044e92be60a2ae15f25fabd
font_01_sfnt_off0000dd4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4F 10384 bytes
SHA-256: 835454090f227834b9b0ec92325733c985d2560f4e6ae55c736f0189f215950e

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