Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3038583226e973c…

MALICIOUS

PDF

47.2 KB Created: 2020-11-07 09:31:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 609d4c99656d68c9fa0a546731eb2411 SHA-1: a8a1873981b3d10ad5146f898d7b6cb549f6d78c SHA-256: f3038583226e973c7e9e0b5985513f3b9b4b655e34b3dc5ebf3655cf6eecba3d
146 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://trafffe.ru/123?keyword=h+r+block+key+code+discount PDF link annotation
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/8a3a7d01008d78.pdfIn PDF document text
    • https://xigeworimejol.weebly.com/uploads/1/3/1/4/131483719/tarobuxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426422/normal_5fa5d137bf0e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406482/normal_5f979261daeac.pdfIn PDF document text
    • https://kenilajapa.weebly.com/uploads/1/3/1/0/131069910/4925866.pdfIn PDF document text
    • https://basuxebuj.weebly.com/uploads/1/3/1/3/131379820/4824902.pdfIn PDF document text
    • https://gobisenuginofaz.weebly.com/uploads/1/3/4/4/134490447/2624195.pdfIn PDF document text
    • https://tugajepefur.weebly.com/uploads/1/3/1/4/131453805/5527849024d6.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://bufuvuxigul.files.wordpress.com/2020/11/suvasemerozusew.pdfIn PDF document text
    • https://vefaxex.files.wordpress.com/2020/11/6346994850.pdfIn PDF document text
    • https://rukuduxep.files.wordpress.com/2020/11/98519614437.pdfIn PDF document text
    • https://lirudugam.files.wordpress.com/2020/11/cognitive_development_worksheets_for_preschoolers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8921857-2be3-4ded-9698-5ef0d78e6b18/rorozedopimoliduni.pdfIn PDF document text
    • https://suvarofora.files.wordpress.com/2020/11/lodebukiworidu.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_off00006b5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B5E 4872 bytes
SHA-256: 6e7442172c8f409bf083d1a9bb5f6b9f1dd2be8f0beee6f43dbf9b8899d96785
font_01_sfnt_off00007bf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BF4 11176 bytes
SHA-256: f6875836debd5b75b006af77b858da929fcbfd86c0a6b3075c37295c33afdd55
font_02_sfnt_off0000a1ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1EF 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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