Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3d46ea02550d097…

MALICIOUS

PDF

70.5 KB Created: 2021-02-17 20:22:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: bb267c260219c8d056884e7b17dde21a SHA-1: afc5fec7233dede9c891a0d6a5bf1e792bd6854c SHA-256: b3d46ea02550d097a37ed659a7def2fa423e5cbd75fe63e43a0b1a3f5f96fb55
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate 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 potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/strik?utm_term=toro+824+snowblower+electric+starter PDF link annotation
    • https://cdn.sqhk.co/wafifovuwel/jahjrha/keyboard_change_keys_windows_10.pdfIn PDF document text
    • http://xteenware.online/autonomic_nervous_system_pharmacology_questions_and_answers7fyni.pdfIn PDF document text
    • http://guvinesusavilo.iblogger.org/hazardous_waste_report_management_method_code_h141.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365545/normal_5fce25584ced2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415934/normal_601e70f50d109.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446781/normal_5febe31188722.pdfIn PDF document text
    • http://imkl-checker.com/ssa_christmas_carolshb2s1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425235/normal_5fe42a93e2db9.pdfIn PDF document text
    • http://hookup671.site/bijuladazuvirizi2mspq.pdfIn PDF document text
    • https://cdn.sqhk.co/tinupolureg/iggeig9/34583606699.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/zamuriza/87525745770.pdfIn PDF document text
    • http://tixinova.rf.gd/96874442935.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/lipid_profile_normal_values_chart.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_off0000d5e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E3 5388 bytes
SHA-256: da611fa901bf93dbfa36adcd0a64a0d748403f42f67dd1f260864ca0defa626d
font_01_sfnt_off0000e858.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE858 10920 bytes
SHA-256: 280a0686b67f15559ee2c6fcdbe74c4c2b4e284d46033fdfe8a32cc7b2a0f78a

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