Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a856939b5e277c9…

MALICIOUS

PDF

70.2 KB Created: 2020-11-24 09:45:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: edf5e9aa051947c213b9b165e3e8df11 SHA-1: f30d49e0901a5a552125aa17c6788e2ce8cc6beb SHA-256: 0a856939b5e277c9f7670730c61a749a0cf7287efe90c099a3e65f51fa081c4c
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure, likely intended to direct users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://cctraff.ru/strik?utm_term=carmen+stromae+histoire+des+arts In PDF document text
    • https://cdn-cms.f-static.net/uploads/4390659/normal_5fb97014712e2.pdfIn PDF document text
    • https://rokozozo.weebly.com/uploads/1/3/4/4/134498035/keroxe-bijapipabi-nuvirus-zitevegikadu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374963/normal_5f95954d1949a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405641/normal_5faaebcdd0646.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386593/normal_5fa66b9442689.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370768/normal_5f897f6261f4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388048/normal_5f96e2f593706.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366018/normal_5f94df311d1b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380219/normal_5fa1bc8eaa0af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373016/normal_5fa0f1f6cc9e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421783/normal_5fa699686dca9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/db17878a-a302-43db-9d01-ed007f9394b9/jumolexaguzajo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27b7c4a4-a78c-4158-ba35-078ba137cc61/warrior_shredding_program_2.0_free.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_off0000d37e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD37E 4936 bytes
SHA-256: 1b02d53abb382a63225a984f854235e8d57d1b50eb8f219d5d43280171c03739
font_01_sfnt_off0000e410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE410 12440 bytes
SHA-256: d8f08adf51f82c6bf14936a675dfb3b5d8dac58578275396e0b15e4591ca9cd8

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