Malicious PDF — malware analysis report

Static analysis result for SHA-256 491d90fe89917b86…

MALICIOUS

PDF

47.6 KB Created: 2020-11-01 11:47:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-07-02
MD5: fe87fd6f1a8d22118714bd576509025d SHA-1: 57100628da70b4164794dc74c03ca2e7c6c9bfea SHA-256: 491d90fe89917b86cf7b78d546f966c172f0f601ec7269f0e3e07fbc9fc0ab86
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://ggtraff.ru/wb?keyword=fan%20games%20fnaf In PDF document text
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/timelaner-jibivivudokexoj-bagopasufa-giruti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369496/normal_5f8ee2d2a6098.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/9653445.pdfIn PDF document text
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/2a0ea991ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393624/normal_5f9d31e2bc339.pdfIn PDF document text
    • https://fenawivo.weebly.com/uploads/1/3/4/0/134000055/71b4b0688264ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379839/normal_5f928c840fb0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375200/normal_5f92d90835c7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443588/normal_5f9caca445170.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/ac353241-70e2-4f78-9ce6-71751bf68375/mol_point_free_serial_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9739/8689/files/34938134123.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94cd7ee3-090d-4500-9dab-ade43cd526e0/self-reference_effect_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88c20709-62e5-4bea-9fd2-027c31e2ffe4/gajaronigaj.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/31986201365.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/marathi_barakhadi_writing_practice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfc01ddd-5f91-4639-b860-7098e57f604c/67438714726.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_off00007bfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BFD 4912 bytes
SHA-256: baedaa943c123b6b9cf29d14bbddbd04dc895305251573a7df52ba31a74091db
font_01_sfnt_off00008cb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CB3 10820 bytes
SHA-256: 32b1345f3a0753ad2d9bab662fbf013d3a1cdd2bd41e910549cc1b3eea116622

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