Malicious PDF — malware analysis report

Static analysis result for SHA-256 26e2e9960afb4dc6…

MALICIOUS

PDF

77.5 KB Created: 2021-03-27 09:44:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 55b3ae49c93ce843afeb8bcfa2a10d9d SHA-1: 76c86f91daaf18428323ffdc938db50eb964218a SHA-256: 26e2e9960afb4dc6fd11f0171d5738bda42fd3021b034003e4d15da58335f82f
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The file contains numerous external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The embedded content, though heavily obfuscated, appears to be part of this scheme, likely to drive traffic to malicious or spam sites.

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://leonvi.ru/award?keyword=carie+dentaire+traitement+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366647/normal_5fef3b1a31b17.pdfIn PDF document text
    • https://mabamigetope.weebly.com/uploads/1/3/4/4/134493328/pebavo.pdfIn PDF document text
    • https://wapafakomix.weebly.com/uploads/1/3/4/7/134740591/f9aac.pdfIn PDF document text
    • https://wunobenera.weebly.com/uploads/1/3/4/8/134887230/4884877.pdfIn PDF document text
    • http://tezoxefakalexo.sportsontheweb.net/lugelanof.pdfIn PDF document text
    • https://rokotejipap.weebly.com/uploads/1/3/0/8/130814190/fc4f1e7a7.pdfIn PDF document text
    • http://siwosupegejolop.medianewsonline.com/kiwarego.pdfIn PDF document text
    • http://bumumapa.mypressonline.com/dabewejoxojutemebas.pdfIn PDF document text
    • https://dafubadam.weebly.com/uploads/1/3/0/8/130874240/6619205.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465387/normal_5fdad1345f21b.pdfIn PDF document text
    • http://wikotimu.scienceontheweb.net/fanamolane.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/be6024bb-2589-4a09-81a4-de804a53e15e/cantos_para_el_domingo_de_ramos_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f253d25a-124d-4e7a-a03f-c0967ba0732f/87634575960.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/chip_s_lament_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/actualiser_tableau_crois_dynamique_google_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a079a956-58ee-486f-8def-d03060ce47d0/zapixojubuzezafozepedaxiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23115483-b1a8-4e80-9e9a-3b4f3986f23a/sutelapuxumokebuxa.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_off0000e8ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EF 4880 bytes
SHA-256: 832432dff7adcb9681778c000fc541f6e83c466951fb55cc6cd349e9dcc048fd
font_01_sfnt_off0000f972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF972 12304 bytes
SHA-256: a1e0de9de66e129ec5dc7ddf94b18d3b53a7ac83c917ef72237cdad0f3713fc2
font_02_sfnt_off0001200f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1200F 1736 bytes
SHA-256: f27f1dab863be407bc80ce69f069aaa000ada345c50a5fba1d6b915b5f603bb6

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