Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b24a00225ecf2cb…

MALICIOUS

PDF

74.9 KB Created: 2021-03-09 20:46:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f39ff2ec32c090661db19c61586177a1 SHA-1: ab82590c02a434d131c445b980e509aa67362180 SHA-256: 9b24a00225ecf2cb4b8ab5067e9090c3b5fc0e1d02537a68af7073f9ebc75572
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, with one prominent URL pointing to 'kuzutuzo.ru', suggesting a phishing or malware distribution lure. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a product name, which may be part of a social engineering attempt to disguise the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/strik?utm_term=braun+thermoscan+ear+thermometer+flashing PDF link annotation
    • http://tudanopebula.iblogger.org/narrative_essay_outline_template.pdfIn PDF document text
    • http://xorabawik.medianewsonline.com/28380311113.pdfIn PDF document text
    • http://lakuberik.mywebcommunity.org/tegosajafikuz.pdfIn PDF document text
    • https://cdn.sqhk.co/kowumutajaw/hb6AXK5/48077674860.pdfIn PDF document text
    • http://tijijosopake.22web.org/vakesasemukijaredologi.pdfIn PDF document text
    • https://cdn.sqhk.co/tawavumazo/Oji4Pgi/joronabinizewajeluwawidos.pdfIn PDF document text
    • http://wutigesekigaj.22web.org/excelsior_orthopedics_patient_portal.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/64ca7e1a-9000-4315-85b4-68bbf64af93c/blue_is_the_warmest_color_online_free_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/hello_brother_bollywood_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9ad3506-9933-4944-89da-8a116db3e9ab/el_significado_de_la_palabra_guerra_de_guerrillas.pdfIn PDF document text
    • https://s3.amazonaws.com/paxunu/free_check_register_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/kimone/54845293816.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7bb4b055-6f34-4607-b42b-be22b36d0fb6/lanuvososuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82f486bc-281c-4d15-9101-dc1790b4547f/44190794149.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb87c376-2894-4759-a062-573f06e35909/2020_hyundai_sonata_maintenance_schedule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/981a55f2-1536-445f-9be0-fb76af24c666/rinenir.pdfIn PDF document text
    • http://xivubijorudi.epizy.com/drum_sheet_music_for_christian_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/pilixal.pdfIn PDF document text
    • http://levapoloj.onlinewebshop.net/80858824229.pdfIn PDF document text
    • http://mezomiwewelebe.epizy.com/cours_complet_d_automatisme.pdfIn PDF document text
    • http://ximuxulizi.myartsonline.com/rafarixosipurunutexobeb.pdfIn PDF document text
    • https://s3.amazonaws.com/dagasopones/71090675014.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2280797-f2ed-4d56-bc25-f2b63577337c/types_of_comparative_research_methods.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_off0000e99a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99A 5344 bytes
SHA-256: d3bb9121207e83bee136a24ff0f278361a1a118402ca05da83c3bf3257905023
font_01_sfnt_off0000fb9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9C 10016 bytes
SHA-256: 8739d487a05b0772463b0b441526146222336003911df6dce1cc34f3b68b379f

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