Malicious PDF — malware analysis report

Static analysis result for SHA-256 24e34c2d71168b60…

MALICIOUS

PDF

83.7 KB Created: 2021-03-14 02:52:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 5493328da8fabda60b8604145d12efcf SHA-1: bdf3f88c1c871fdea1dafb427185571e2ece341b SHA-256: 24e34c2d71168b6030d20ae318a95935f5aab7e670f41c7657ce7f5c9318fe44
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains a large number of external links, suggesting a link farm or SEO poisoning attempt. The primary external URI points to a URL that appears to be part of this scheme. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links indicate a malicious intent to redirect users to potentially harmful websites.

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 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.
  • 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://botokaw.ru/award?keyword=maxon+cinema+4d+tutorial+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384644/normal_6022c6e5d1eff.pdfIn PDF document text
    • http://vamolufu.getenjoyment.net/banodegukilijuvajovetajuk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423148/normal_60028c0807537.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392439/normal_5ffcded74a086.pdfIn PDF document text
    • http://nakalabaxis.mywebcommunity.org/how_to_evaluate_a_book_of_business.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/jeponowon/6562771361.pdfIn PDF document text
    • http://fuwutowamig.myartsonline.com/11063378208.pdfIn PDF document text
    • https://2dc0326d-ac60-47d8-bf46-f2dc9d334570.filesusr.com/ugd/21b4a7_eafa20df977144e6baae5bb110d51cea.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/novifamigot/97619159141.pdfIn PDF document text
    • https://cfc603e6-7cd4-4c42-812b-9722deb80ae4.filesusr.com/ugd/0e9fc2_454daaab3a654071ab9e09e91cc4630a.pdf?index=trueIn PDF document text
    • https://76b44699-1094-4fd8-8d4a-70b7be8159c3.filesusr.com/ugd/c450b2_58333f51d1ba4e56ab2b749fa9a89f24.pdf?index=trueIn PDF document text
    • https://41fe7446-7195-45c8-906d-de5e784989f9.filesusr.com/ugd/e02969_6285e01de3f14c63a6648fc02c7034e2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gagotaniwipure/xalolalusadekajon.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/aspects_of_personal_development.pdfIn PDF document text
    • https://a2c67b61-a01d-4053-b7ad-f1487bca8054.filesusr.com/ugd/24853a_de4819696cc748caa37b2ab0e369f5cd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/37f03d5a-79f9-4d1d-a0e9-7b83377067ee/nepidinijanizideki.pdfIn PDF document text
    • https://s3.amazonaws.com/ritoma/how_to_replace_inducer_motor_on_carrier_furnace.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/062beb39-b910-405e-ae73-332cfd055285/59108257747.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_off000107f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F4 5284 bytes
SHA-256: fd1eed0cbb5fdee6509d126a060c019db06dc0031e44211bb85c4499ce1e9304
font_01_sfnt_off000119eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119EB 11368 bytes
SHA-256: 122f50f395087c3317f3f663e67fefb378ff98e21461a737b28018f2fce1a1c5

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