Malicious PDF — malware analysis report

Static analysis result for SHA-256 159a38d200bfd6ad…

MALICIOUS

PDF

69.6 KB Created: 2021-02-20 17:01:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 1075f44c85b3cd8429e71b068a676ba5 SHA-1: af07620301f21c8fc68708056788e944362035e3 SHA-256: 159a38d200bfd6add7e6b4a7f1b680eb4a29b7aa266f2c447efd7ef4de396fb4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs, many pointing to disposable domains, suggesting a link farm designed to redirect users. The document body, though heavily obfuscated, appears to be a lure related to a common search query, likely to entice clicks on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/123?utm_term=cuantos+mililitros+son+150+gramos+de+aceite PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481155/normal_6020821c10488.pdfIn PDF document text
    • http://skywonder.space/rukufoxotikolokuvenmy4te.pdfIn PDF document text
    • http://fito4ka.xyz/afsc_listq2fto.pdfIn PDF document text
    • http://joy-todays.online/316756113850vovs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383801/normal_6005f069574db.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408596/normal_5fc5bca1b2625.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423166/normal_600f21871e5f3.pdfIn PDF document text
    • http://bettermoneytips.com/fruit_slice_master_appqowvb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403418/normal_600c059a7d519.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488572/normal_5ffdccd48f18e.pdfIn PDF document text
    • http://svoylend.xyz/ada_diabetes_espaol3xc8x.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://birijigasexow.epizy.com/google_translate_app_for_android_offline.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/kujumu.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_off0000d216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD216 5484 bytes
SHA-256: d831869826317ef93f82c837952e421e6074ec7fa5297ce228fd380549f3cced
font_01_sfnt_off0000e4a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A1 11268 bytes
SHA-256: fc9cb8a2b9546c0be60778e91eaa7d838825f1a3b51292de1bd7c255e881bf35

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