Malicious PDF — malware analysis report

Static analysis result for SHA-256 2145b97ef7fb6c31…

MALICIOUS

PDF

72.2 KB Created: 2021-02-24 01:10:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d0c6780223ec7091f5e38e745b5805d2 SHA-1: 96ac2a463b1f037023b8a6ab5bc1d0435d360bf0 SHA-256: 2145b97ef7fb6c31a4956338fdcb0b08dbb4502d9c972243d61bab694ec58d93
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wix?keyword=comic+strip+maker+for+school PDF link annotation
    • https://rajizoru.weebly.com/uploads/1/3/1/8/131856770/6981956.pdfIn PDF document text
    • http://wildboost.club/5695695634368xw7.pdfIn PDF document text
    • http://odemebayisitrafik.com/army_prt_running_drills0yed1.pdfIn PDF document text
    • http://heliusdesign.ru/50080309004k6i9t.pdfIn PDF document text
    • https://tomanudiz.weebly.com/uploads/1/3/1/6/131606325/setebivifeta.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467038/normal_603588d35b355.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419415/normal_6032aee381c99.pdfIn PDF document text
    • https://manabuvajej.weebly.com/uploads/1/3/4/8/134847277/mibegomoso-podafusego-fuzosupixumoze-wagejezidok.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382782/normal_5feb32da444b4.pdfIn PDF document text
    • http://sunny-web.ru/lijuzatetumaxy902j.pdfIn PDF document text
    • https://rotexutipuz.weebly.com/uploads/1/3/5/9/135966590/244984.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405899/normal_600b685fcbfee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419630/normal_5fcf8a2418e65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380229/normal_5fd7c769d4334.pdfIn PDF document text
    • https://simisodiguguvig.weebly.com/uploads/1/3/5/3/135324772/majufapebog-wezupajuz-fuvogo-melezus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418762/normal_6034dc88187b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371248/normal_5fc78f144799a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496815/normal_600e3dfb467c5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tawovojo/80360573942.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_off0000de39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE39 5224 bytes
SHA-256: 78947f398e2ecf54f3f7246a66ad71022b87940861bd1850b3f583ce6e4f2ad4
font_01_sfnt_off0000efd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD8 10552 bytes
SHA-256: f938a8d6219867ba9fd1118295b0f9a28e5af6948970ff9f1d08e5e7991ae926

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