Malicious PDF — malware analysis report

Static analysis result for SHA-256 4146a7754ae1ae3d…

MALICIOUS

PDF

59.5 KB Created: 2020-10-13 06:41:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: cece37f6bdbf15ac82224a799d1ebe78 SHA-1: 9bae8afd4faa3056e75edad7aabd5b2913320e2f SHA-256: 4146a7754ae1ae3dcd84132bf41bed46639aa91d0a2bb93054a12ba81a14c4a2
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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/strik?keyword=competency+based+curriculum+tesda+pdf In PDF document text
    • https://site-1039641.mozfiles.com/files/1039641/vujogamodetetazurujimave.pdfIn PDF document text
    • https://site-1036767.mozfiles.com/files/1036767/wonutimanororu.pdfIn PDF document text
    • https://site-1037010.mozfiles.com/files/1037010/61046378383.pdfIn PDF document text
    • http://files.mobileperformancetherapy.com/uploads/1/3/0/7/130739250/viwavunum.pdfIn PDF document text
    • http://files.mulberrylodgewillunga.com/uploads/1/3/0/9/130969205/fobev.pdfIn PDF document text
    • http://dedar.talentlessandoptimistic.co.uk/uploads/1/3/0/9/130969205/2ad9ef6827.pdfIn PDF document text
    • http://files.centralfoodnetwork.org/uploads/1/3/1/3/131383318/bunuzozagu.pdfIn PDF document text
    • http://files.rbrphotography.ca/uploads/1/3/1/4/131437018/joziviro-mezebuli.pdfIn PDF document text
    • https://site-1039261.mozfiles.com/files/1039261/limonofox.pdfIn PDF document text
    • https://site-1043880.mozfiles.com/files/1043880/74863499130.pdfIn PDF document text
    • https://site-1043203.mozfiles.com/files/1043203/gexerikixakaregisowod.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/77830c27-b8fd-4b0a-9a1a-276464b78925/18554695705.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8fe0698-2214-4e7a-9aa2-c35924e5ede8/57886942748.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_off00009d51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D51 5448 bytes
SHA-256: badb07bbf4bdf14804a6851409fff9bb994c9faed183c4fb01a472f09e3a11fc
font_01_sfnt_off0000afb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFB9 16176 bytes
SHA-256: a0e60b42fac977f3285f07ff43430695f1582b9d7cca813244c33804fa8241b2

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