Malicious PDF — malware analysis report

Static analysis result for SHA-256 a296276b9670cbf3…

MALICIOUS

PDF

45.5 KB Created: 2020-11-06 08:47:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 841f806a1390e56270ad7e28cde61d67 SHA-1: 4ab1b77536d2888ac58c6f535a22023cba6254a3 SHA-256: a296276b9670cbf3b917be57be7a86666508025315669a5c8efb31ea8c24d59e
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://trafffi.ru/123?keyword=amazon+mytv+activate+roku PDF link annotation
    • https://womufotijomagew.weebly.com/uploads/1/3/4/3/134351515/095e87516.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384164/normal_5f971d85451f5.pdfIn PDF document text
    • https://xonuveviriniw.weebly.com/uploads/1/3/0/7/130738603/fajeguxako-wodom-taziwifiwakodil-gitin.pdfIn PDF document text
    • https://bozofuki.weebly.com/uploads/1/3/4/3/134322044/8c0b31b0dcf83.pdfIn PDF document text
    • https://wizenavadabavor.weebly.com/uploads/1/3/4/5/134518239/7468955.pdfIn PDF document text
    • https://zepixufiguw.weebly.com/uploads/1/3/4/1/134108583/462b74aadd9bd89.pdfIn PDF document text
    • https://xogazusuguse.weebly.com/uploads/1/3/4/4/134479670/vinoda.pdfIn PDF document text
    • https://redunexodozik.weebly.com/uploads/1/3/0/8/130814050/7fa9a0f.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://s3.amazonaws.com/pazifetanegapu/44503319766.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/delegation_skills_for_leaders.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/antimicrobial_activity_of_honey.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_off0000669d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x669D 4880 bytes
SHA-256: e17a94f63e63f6250a0d9ee98c676efedd00b356edbc0761c57e0a15267f2ebc
font_01_sfnt_off0000772b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x772B 10800 bytes
SHA-256: 0e95fc1f216b6c18116a5e748f6d855209108ac9cd4ecd6b8290c9795365ce3b
font_02_sfnt_off00009b3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B3D 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3