Malicious PDF — malware analysis report

Static analysis result for SHA-256 982f61483cc38b0a…

MALICIOUS

PDF

44.9 KB Created: 2020-10-15 19:18:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 25dfa1992ebec931a9aa08520792177a SHA-1: 2e38abe183950f40abda86073388e304298d4a85 SHA-256: 982f61483cc38b0a67a180b9468b0f0d45bd782b3497db8de680dcfe43f9d975
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://cctraff.ru/123?keyword=compatibility+test+for+couples+pdf In PDF document text
    • https://site-1039400.mozfiles.com/files/1039400/jolofowixiriguvejo.pdfIn PDF document text
    • https://site-1042187.mozfiles.com/files/1042187/sokapiwavuxonirisavewadir.pdfIn PDF document text
    • https://site-1040424.mozfiles.com/files/1040424/4759981022.pdfIn PDF document text
    • https://site-1040682.mozfiles.com/files/1040682/mazevebejibebajitiziruwif.pdfIn PDF document text
    • https://site-1040005.mozfiles.com/files/1040005/dazowuniva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365652/normal_5f87048a6d45f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367632/normal_5f87489735d5f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367302/normal_5f87cf90acf5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366646/normal_5f87dfd868b54.pdfIn PDF document text
    • https://site-1037864.mozfiles.com/files/1037864/4522996634.pdfIn PDF document text
    • https://site-1039330.mozfiles.com/files/1039330/futivewijupuwobemub.pdfIn PDF document text
    • https://site-1038670.mozfiles.com/files/1038670/tasebokejus.pdfIn PDF document text
    • https://site-1040099.mozfiles.com/files/1040099/95963581703.pdfIn PDF document text
    • https://site-1040319.mozfiles.com/files/1040319/95380543293.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366336/normal_5f87246f8ad1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366374/normal_5f875ebc6e099.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_5f87c9ff916f4.pdfIn PDF document text
    • https://site-1038572.mozfiles.com/files/1038572/xagusu.pdfIn PDF document text
    • https://site-1039494.mozfiles.com/files/1039494/22158385072.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7478/3906/files/combat_hapkido_manual.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_off0000708e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x708E 5448 bytes
SHA-256: 493378ad0d60c4f87db66f3260e4f66d6135729a1f84340a893cbeb75fbe9178
font_01_sfnt_off000082f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82F7 10328 bytes
SHA-256: 6e9eb6a30dc15d3c3d45b26488ed177e0c8f39c2d2ff88a8902fdfa4753a4dcd