Malicious PDF — malware analysis report

Static analysis result for SHA-256 d376436f8abdaad4…

MALICIOUS

PDF

68.6 KB Created: 2020-12-17 07:58:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 4b2a4931933d1157cda85c64bad16e46 SHA-1: 0a6f09986f3475db7fcfe58ae6e73586408618bd SHA-256: d376436f8abdaad448c65407a99780c42cf35eb9b63c87a8fd1ca88fbfd09b59
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file contains embedded links that redirect to malicious infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The ML classifier also flagged this PDF with a high probability of being malicious. The document body, though heavily obfuscated, appears to contain keywords related to a specific location, likely used as a lure. The primary IOC is the malicious redirector URL.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/strik?utm_term=mary+t+meagher+natatorium+louisville+ky In PDF document text
    • https://cdn-cms.f-static.net/uploads/4408873/normal_5f933778cc1de.pdfIn PDF document text
    • https://gonufefimexej.weebly.com/uploads/1/3/4/8/134892828/10806187358.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379984/normal_5fca906e9813a.pdfIn PDF document text
    • https://duxetaxegijojem.weebly.com/uploads/1/3/4/8/134870405/kopufela_movat_wovawufij.pdfIn PDF document text
    • https://wefanuku.weebly.com/uploads/1/3/4/6/134611064/melibuxuvorujipevot.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/purawuma/zajegurulomamod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c53c06d-cff5-4917-82eb-311901797238/xawefalenapimiduwimowavop.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce19773b4ad40d4a7f44df/t/5fd689e172b1137fa97c624d/1607895521386/astm_e837_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bupesejirijejus/20213580420.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc30b2524b06a7eb30d4f82/t/5fc4c5dc61e25426e1ce5d92/1606731228628/minecraft_tech_mods_curse.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/sevanimewedutafumi.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_off0000ce10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE10 5332 bytes
SHA-256: 1661e095543306648be3b404d05ccc3b4dbdb1d29f415ecd26dd95ef0636254f
font_01_sfnt_off0000e022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE022 10884 bytes
SHA-256: 9316269f2fca666eb2a366f7f5fdf7f71f9e617e0cc3dbb74276e252a6cba323

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