Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba2017852964e3ec…

MALICIOUS

PDF

133.5 KB Created: 2021-06-06 18:12:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 3903ee4f19e894c9c4edde97c82e223f SHA-1: d85455f23b4b0eae39e21e263ab739b84131f4ca SHA-256: ba2017852964e3ecd97c31a0a0fcff81f412c99954377de6253862c24e9601e0
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to PDF files, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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://gimoguvi.ru/123?utm_term=latitude+e7470+owner%2527+s+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379471/normal_60610b85b5c59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479433/normal_6047651002b6e.pdfIn PDF document text
    • https://jefibapo.weebly.com/uploads/1/3/2/7/132712451/bf6b3454.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373522/normal_60616a381adc2.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4416321/normal_60b544b785fb8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467573/normal_5fc7c3d939b3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417327/normal_601bbb2a05d81.pdfIn PDF document text
    • https://laduvozonos.weebly.com/uploads/1/3/1/4/131408864/840132.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425727/normal_60683dda88ecc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485301/normal_6027fff694f90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454280/normal_6067c18ca52fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370270/normal_6061073037df1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413363/normal_6018e92ea59cf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371786/normal_5ffd58581e1cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406782/normal_5fc6587ad8399.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377408/normal_5ff5f81cd5b7d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xalanupuzewo.pbworks.com/w/file/fetch/144423477/varuzutonasediwunufakaj.pdfIn PDF document text
    • http://gozuwef.pbworks.com/f/bloons_tower_defence_4_hacked_arcadeprehacks.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_off0001cac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CAC8 5348 bytes
SHA-256: 1061755b0ad56a2278f39d1c5ea7062368e7a51010a4d3aabe076939a93c225b
font_01_sfnt_off0001dd0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DD0A 12408 bytes
SHA-256: b362d2fce9c642a4c0a858e5212fcba0ed9f613936b44538a803345f78cb8a50

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