Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef0e5cae1a475835…

MALICIOUS

PDF

43.3 KB Created: 2020-11-07 09:44:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-19
MD5: 01943e3db550742b560edb557eb8a2c7 SHA-1: 5eaf4260966b2a9a604bd6c0d43b6560d54d5f8a SHA-256: ef0e5cae1a4758357d5921be3cc3cc8e27a6cd8955acf86a67b9546dd5db7153
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://trafffi.ru/123?keyword=world+history+timeline+1200 PDF link annotation
    • https://ridolagu.weebly.com/uploads/1/3/0/7/130775195/8963435.pdfIn PDF document text
    • https://jubunukaf.weebly.com/uploads/1/3/1/4/131483214/lafita_daxapujuwum_notugezi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468294/normal_5fa50f9f3f511.pdfIn PDF document text
    • https://nabofirolem.weebly.com/uploads/1/3/4/6/134632364/4649160.pdfIn PDF document text
    • https://rikisuluwujufa.weebly.com/uploads/1/3/1/4/131452938/doteta.pdfIn PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/ripotot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388620/normal_5fa3d637f182a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415309/normal_5f946b662d1cd.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/b9b90370-160a-4f52-9120-8f8b37ef53e3/livro_dieta_dukan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60f13089-6811-4aff-a825-a5d42f0fe255/bomolawijonewidoruv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afdc2dbc-e7ef-42fb-b259-1b8684eea858/vibexo.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/army_sleep_system_stuff_sack.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/instant_family_streaming.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_off00006c71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C71 5296 bytes
SHA-256: 3a4a6787f636e01bca466db8154f998d45f362dfdfa2297e3e1f8c34bc29fb70
font_01_sfnt_off00007e5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E5F 9916 bytes
SHA-256: 69ba8bfddcbc8395cec927fd78a6ff33e043f42308009410f2c5208cbd3499ea