Malicious PDF — malware analysis report

Static analysis result for SHA-256 127f862635a44062…

MALICIOUS

PDF

40.8 KB Created: 2020-11-08 06:13:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 47fa4bd6799fad384321fe66f5e53be1 SHA-1: 0c2934e0d56cbd93c963da9b370144e6e38d7e3a SHA-256: 127f862635a44062c793bde94bc6e02489ff0e86501cb86b44bd5cc3842670e4
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://trafficel.ru/123?keyword=calcium+hydroxide+ksp+expression PDF link annotation
    • https://kavanezeso.weebly.com/uploads/1/3/4/4/134477356/00c68e.pdfIn PDF document text
    • https://wopuremob.weebly.com/uploads/1/3/2/6/132696580/wagumo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384839/normal_5f8c3ac65c4d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445733/normal_5fa75efb9cab9.pdfIn PDF document text
    • https://tiludidiliduw.weebly.com/uploads/1/3/4/3/134385670/73d8ee3e23e015.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/1289162.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387816/normal_5f8fc5d0d80f7.pdfIn PDF document text
    • https://lozulijulejibog.weebly.com/uploads/1/3/1/8/131857057/nibagubivotexo.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/f7ffdb1c-8636-402f-9b1e-1344ef195de3/91455576538.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb555273-580d-4bb2-8a69-c2b1d4df47ce/jidunovox.pdfIn PDF document text
    • https://fefitaw.files.wordpress.com/2020/11/64939725781.pdfIn PDF document text
    • https://sisiviweze.files.wordpress.com/2020/11/goresosuvufat.pdfIn PDF document text
    • https://pufelaneniw.files.wordpress.com/2020/11/sifiginagerupisuti.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_off00005ead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EAD 5452 bytes
SHA-256: f65b2ef335b7ca5cac46e27044f678eed6c42d08b378050f0e10ab4d936ab6d4
font_01_sfnt_off0000710e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x710E 11416 bytes
SHA-256: da0816a1bcd0230bb2c28c5adb3f37eaf8cf1032ff54997998c6a9ac8edf00de

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