Malicious PDF — malware analysis report

Static analysis result for SHA-256 268069ddb028477b…

MALICIOUS

PDF

72.3 KB Created: 2021-02-24 22:14:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: be8b2ed3222bfd46099cb30bd740da45 SHA-1: 1a6a94576fa30b34cf8e47b2a3a4a811e6c3644c SHA-256: 268069ddb028477bac1e88bdc893a75caeb6418d8e4c6a99fc2c3123b6947dbe
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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=canon+sx710hs+webcam PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459341/normal_5fe786505bc2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389570/normal_60110fd14f4a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420013/normal_601aac942c6ab.pdfIn PDF document text
    • http://lnstagram-badge-verification.com/introduction_to_machine_learning_cmu-10701s5gfg.pdfIn PDF document text
    • http://reawolt.online/informatics_practices_class_11_notesc2s0v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418192/normal_5ff0b13577a1b.pdfIn PDF document text
    • http://sdfsdfsdf.shaketorch.com/11671627083.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403276/normal_5fe3b76d85d3c.pdfIn PDF document text
    • https://livakazogoje.weebly.com/uploads/1/3/4/6/134622539/7a05870.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/pibabopuduj/damian_marley_welcome_to_jamrock.pdfIn PDF document text
    • http://jiboleramar.epizy.com/baofeng_888s_manual.pdfIn PDF document text
    • http://kepepisex.epizy.com/20411693880.pdfIn PDF document text
    • http://sekovukubetib.epizy.com/87981330331.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_off0000dc76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC76 5392 bytes
SHA-256: c8b7062520a3401a9663d04da6b44132e467cb0d28d6073ca10fe8fc0df5536f
font_01_sfnt_off0000eec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC1 11200 bytes
SHA-256: 260ccfbca8bbfe78d459f5658d295c3bc2e5b42b96fde7ada510915aeda83da3

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