Malicious PDF — malware analysis report

Static analysis result for SHA-256 20d74ebdabd2d3b3…

MALICIOUS

PDF

70.1 KB Created: 2021-02-24 06:13:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 5839cba246d0d114803c80ac8ebb5af7 SHA-1: a2e23baf42d2bf2cc66dd3f8c6132775e8109cd4 SHA-256: 20d74ebdabd2d3b3eabc4cb3a7cfe34792139ca9cf7231c65fd878219f0719c1
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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/wix?keyword=chemistry+a+volatile+history+worksheet+episode+2 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4466173/normal_6019383cbfc26.pdfIn PDF document text
    • https://tewawabuse.weebly.com/uploads/1/3/1/4/131437503/nuzekevisuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372980/normal_6024af823d711.pdfIn PDF document text
    • http://lidekuzadapuvi.22web.org/xezep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426263/normal_5fd065ba8deda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419410/normal_6032b2304f3d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456119/normal_602c07a8be9f8.pdfIn PDF document text
    • https://tafubevodila.weebly.com/uploads/1/3/4/0/134016741/xisegexosuxunu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460446/normal_603272e00ed74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406481/normal_6026d11da7d9c.pdfIn PDF document text
    • https://mesenogixu.weebly.com/uploads/1/3/4/7/134736765/204732ce2086502.pdfIn PDF document text
    • https://legoxadev.weebly.com/uploads/1/3/2/3/132302888/d98ebc8cb28b8.pdfIn PDF document text
    • http://rakajipof.22web.org/4215015870.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374685/normal_5fc98717bfcd4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407062/normal_5fc760f2bc402.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379029/normal_602598c192b4a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369907/normal_5ff553b94d8e1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pumajuxav.rf.gd/sat_subject_test_score_calculator_math_2.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_off0000d35f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD35F 5556 bytes
SHA-256: 8cede395c82d31568c28d3077c984fa9b0490601c156d57e2bbf4ee4d05a3f74
font_01_sfnt_off0000e62e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62E 10844 bytes
SHA-256: c63cff4fd29710fa20b9d0cbe6f1ea4bc68a9d5ebfdd207bfb358b5b586184d0

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