Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce21199f6cc0d41f…

MALICIOUS

PDF

41.5 KB Created: 2020-11-08 18:31:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: eac119b16ab369cf4031f4f1969218c2 SHA-1: 0c112ea8400b1e6a0976116c67114b565dd4c84e SHA-256: ce21199f6cc0d41f4b91c12bd1f25a47ee37be3884a3770cbc158412262481cf
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/123?keyword=simic+hybrid+stats In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375517/normal_5f9c6058f28e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408588/normal_5f93552c5e569.pdfIn PDF document text
    • https://pobezewimo.weebly.com/uploads/1/3/2/6/132681951/2aa5a9e2fc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366321/normal_5f8b817babdc8.pdfIn PDF document text
    • https://dubanivexog.weebly.com/uploads/1/3/4/3/134331992/zexos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383688/normal_5fa6496e492be.pdfIn PDF document text
    • https://rosuxemu.weebly.com/uploads/1/3/0/7/130776582/tagerezupubiji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374545/normal_5f8b0b54b16fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423728/normal_5fa2f29cccd47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391331/normal_5f95fd32b5ad6.pdfIn PDF document text
    • https://relugudikovok.weebly.com/uploads/1/3/4/2/134265752/4943837.pdfIn PDF document text
    • https://baxinumep.weebly.com/uploads/1/3/4/3/134366260/f2321.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372681/normal_5f89b7ce54cb6.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/e875f1a0-f55a-43dd-aded-fcb09ed1a380/strength_of_materials_civil_objective_questions_and_answers.pdfIn PDF document text
    • https://nawazuled.files.wordpress.com/2020/11/duxavavosukenavuloze.pdfIn PDF document text
    • https://gufanusotin.files.wordpress.com/2020/11/slander._com_math_answers_algebra_1.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_off00006475.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6475 5492 bytes
SHA-256: 623281dedd55604cd8c86d567856ebea23bc630eb8c19e5cd14bf6e5c84de1f6
font_01_sfnt_off000076f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76F9 10032 bytes
SHA-256: 598ec11d6fee71c9b460630b893156193f681f984189828f05b74e06c0bdf53c

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