Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fd6ecae91d4d8b4…

MALICIOUS

PDF

69.8 KB Created: 2021-02-26 01:33:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 20b025ddfe26d49c5b20ebcd6316029b SHA-1: c1e4ef880b8e86270670c14df126cf56cb57db50 SHA-256: 7fd6ecae91d4d8b4dc2bc235acd1e2d0375c74645e8f3da0ef2a80a15c822158
66 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 4

  • 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://druttle.ru/award?keyword=bigger+faster+stronger+workout+plan PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421341/normal_5ff80b23afcf9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444638/normal_5fc7efaf38330.pdfIn PDF document text
    • http://excschool.ru/59226577043cdhe.pdfIn PDF document text
    • http://copyrightreports.com/zimarirusotawupux14chq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414341/normal_600da34bbfcde.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bavizajo.epizy.com/60001132943.pdfIn PDF document text
    • http://wuxigukupem.epizy.com/49160857713.pdfIn PDF document text
    • http://palomidifigur.epizy.com/wotetoguzuwef.pdfIn PDF document text
    • http://muguvap.epizy.com/66868675617.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_off0000d65b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD65B 5272 bytes
SHA-256: bc853e6b6a7665f32a3c73c706de5b3e4702a7b41c368ec4d96f438e3435d3f7
font_01_sfnt_off0000e87b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87B 10080 bytes
SHA-256: ab105e39234a41a3282087dbbb100a59ad3ac38241f2c0268a77ebcc1341d991

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