Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dc20e72ad095efd…

MALICIOUS

PDF

72.1 KB Created: 2021-04-11 22:09:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f2c6185cc32fc81acbd34dba9503ae7a SHA-1: 8eaa6581e7269baca2d5db8a09e8affa47cf5486 SHA-256: 3dc20e72ad095efd9e06a863a63259a0e37e3dbf51e792a45b03fecbb49e42f1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains embedded URLs and heuristics indicate it is a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and external links point towards a common phishing or malware delivery tactic.

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://kuzutuzo.ru/strik?utm_term=uppababy+vista+bassinet+specifications PDF link annotation
    • https://s3.amazonaws.com/lebejos/96072324371.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/reglas_de_acentuacion_agudas_y_graves.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464077/normal_6008b16468b50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368469/normal_605d8e97b105b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480745/normal_5fd2d7fae7077.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370791/normal_5ff50b937d05c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374517/normal_6040ed934b9f2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454681/normal_600188353682b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372399/normal_5fcc534296131.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/whats_the_best_pressure_washer_on_the_market.pdfIn PDF document text
    • http://woziwowariv.sportsontheweb.net/50786139421.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384821/normal_603ded14eb901.pdfIn PDF document text
    • http://gipogup.sportsontheweb.net/64227671977.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gotimovogeminir.myartsonline.com/sikekaramekixewazis.pdfIn PDF document text
    • https://3568ea06-17fa-4787-91ae-86b9aa918cbd.filesusr.com/ugd/8ade13_c8d8cc8d7f324671a8b2d2721706c795.pdf?index=trueIn PDF document text
    • https://b2d1eea7-aef5-47fc-962c-88b5513ecafc.filesusr.com/ugd/3a57bc_ee93db973e9f441590130b5f5fb318e8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d54c8aa-2e04-479a-9a91-a8b44d289f90/38446463178.pdfIn PDF document text
    • https://6f46ab72-b8e3-4ec2-8f01-cb5d6491dab7.filesusr.com/ugd/9a120b_1c26a45af4124925baa7ab6107b7e632.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf6a9e98-bb01-4b5d-ab44-f64443f155f3/letasoft_sound_booster_keygen_download.pdfIn PDF document text
    • https://5b0e1d79-1acc-45ba-a965-31015372eee8.filesusr.com/ugd/67f5f7_fbc555a668f04d5f9d56ae401f1acabf.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC7D 5176 bytes
SHA-256: d24ee1708ab1201d584d1549c478ede126786550ddc15aa17653d0406ad76995
font_01_sfnt_off0000ee3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3E 10960 bytes
SHA-256: ad729de13a62d6aa87279ab5ab87bee2d1fc43453a62c14ebe1e643939582058

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