Malicious PDF — malware analysis report

Static analysis result for SHA-256 3927ee49818832c0…

MALICIOUS

PDF

43.6 KB Created: 2020-11-09 09:48:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 2c39091ec3c33b689229706e146a5ff4 SHA-1: e3798491d466c5b984ae5a57b14941199fdf9dd5 SHA-256: 3927ee49818832c009314da3f4cd40172b4bce44dafdab266697e0d105086f2b
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=aion+gladiator+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421330/normal_5fa6e3d1171cc.pdfIn PDF document text
    • https://sekamaxe.weebly.com/uploads/1/3/4/5/134590712/6514241.pdfIn PDF document text
    • https://faxufoxexukixel.weebly.com/uploads/1/3/4/4/134455740/2ec84620d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450734/normal_5fa84f094a827.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366949/normal_5f9606e4ea9bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373259/normal_5f8af7e20e01a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://vabavoresadi.files.wordpress.com/2020/11/debewasomogoro.pdfIn PDF document text
    • https://likuzow.files.wordpress.com/2020/11/40264502684.pdfIn PDF document text
    • https://rewitaxiji.files.wordpress.com/2020/11/74982790424.pdfIn PDF document text
    • https://vobinujo.files.wordpress.com/2020/11/filosevopavoto.pdfIn PDF document text
    • https://xugijuta.files.wordpress.com/2020/11/lucent_science_mcq_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C9 4688 bytes
SHA-256: cc28ecab89d2d98931f99ca6d6e0cceac56cef5335a07cf2c049072c27e14448
font_01_sfnt_off000071b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71B8 9984 bytes
SHA-256: 97b861052a8d03b4af25d2158b6a306b4981a62cbe071ee0fc7b6c145c2bbac2
font_02_sfnt_off000093f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93F0 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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