Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b2def52fc81aaa3…

MALICIOUS

PDF

47.0 KB Created: 2020-11-07 23:08:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 53c4fcd58b9f1f6b7e84dffe95aa21e8 SHA-1: 595ce9aac846b478fecb6eecab9c9623e39b8edb SHA-256: 9b2def52fc81aaa300b5a12ed240e59b96f2280647985b6290f73d710c7c3f6f
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://trafftec.ru/123?keyword=how+to+raise+your+own+salary+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4382208/normal_5f8bcce12e8e7.pdfIn PDF document text
    • https://xoraxabaxid.weebly.com/uploads/1/3/2/6/132682630/89b144215.pdfIn PDF document text
    • https://dufowazana.weebly.com/uploads/1/3/4/5/134529111/394706.pdfIn PDF document text
    • https://koxoganonigowup.weebly.com/uploads/1/3/1/4/131408343/luwaxana.pdfIn PDF document text
    • https://ranerenonosojib.weebly.com/uploads/1/3/1/4/131483420/xemisalizuxewu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389090/normal_5f992e9f1e6a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402294/normal_5fa672340e8f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393898/normal_5f9e24807464a.pdfIn PDF document text
    • https://tunimesepet.weebly.com/uploads/1/3/1/4/131455680/89768626.pdfIn PDF document text
    • https://nimomobef.weebly.com/uploads/1/3/4/4/134458394/1927332.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/cce27ad5-852a-4630-998b-9f5ef2a7887c/flow_of_cerebrospinal_fluid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7586773-fbf0-4fce-a52f-293ac4c50db8/lightning_returns_achievement_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e327cb39-b41e-4fcf-8832-432bd8f6ed0a/lemon_pepper_seasoning_tesco.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af4737b1-9d51-4adc-b164-04f2349f6215/amor_de_mi_vida_maluma.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A90 5188 bytes
SHA-256: 238eeb24c1b5946c0eb1b75794ff433060934b05251069d96a957bb9ce3b0daf
font_01_sfnt_off00006c53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C53 2284 bytes
SHA-256: e210f5caf6f90775586b0cfd3aa250db75334f282a3ea9a5fa02551b486f1683
font_02_sfnt_off000076d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76D3 10012 bytes
SHA-256: ef5b5fb5e3af5ce19e3ac39d07594feca7b1677e4c8231b3c44ed943c9285814
font_03_sfnt_off00009951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9951 16168 bytes
SHA-256: e5458d7b6d82539349b17fc4713a17e1381d471255c72d9f8116b7c86e08c443

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