Malicious PDF — malware analysis report

Static analysis result for SHA-256 231c0181df2f8728…

MALICIOUS

PDF

66.2 KB Created: 2020-11-10 14:37:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 43912f378b1b6b12705544fd4b4b0fd2 SHA-1: 2ed60f90dd9d2ee561faf8c7effe043c0b4783e9 SHA-256: 231c0181df2f8728a4996dd9ff0e5042c698f9a35e8a1bd39ed709128c906409
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/aws?keyword=villains+movie+2020 PDF link annotation
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/tarewulemiretuze.pdfIn PDF document text
    • https://tewifevorifoja.weebly.com/uploads/1/3/4/3/134387655/2989313.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367271/normal_5f8e23038e8dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386330/normal_5f91f9255dd54.pdfIn PDF document text
    • https://seroselek.weebly.com/uploads/1/3/4/6/134636573/4750464.pdfIn PDF document text
    • https://jowojebutoda.weebly.com/uploads/1/3/4/4/134487303/sufolojitaga_fodesuluz_zisuvebumewabe.pdfIn PDF document text
    • https://gedobelega.weebly.com/uploads/1/3/4/3/134375191/ragebasaz.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://uploads.strikinglycdn.com/files/2fe0d9db-d8b5-4087-814d-bafb49f5bdb1/tudaremajuju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a25cc4fe-93c6-44a2-a3c1-5414e56d18b2/mipakuledovimemizot.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/35884693413.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e95bd9a3-f651-4a04-b253-9bd6605ca545/35634040885.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d6aa175-f8fe-42e0-8c28-12511d425910/springboard_geometry_book_answers_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/55610659023.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_off0000ba80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA80 4744 bytes
SHA-256: 4124671571cd5f00daaa12c9caa4014b55cadaf5a405781ce8ce258098851862
font_01_sfnt_off0000ca7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA7D 10532 bytes
SHA-256: 037a4c27376982222e4e4ef2e62ba54529e7b68df3380c80edb2977d8780adb1
font_02_sfnt_off0000ee57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE57 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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