Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eae95e2fe4e1469…

MALICIOUS

PDF

73.1 KB Created: 2021-04-04 15:13:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ff5c4e78d65b616455c78cd639fb5281 SHA-1: 6d9bbe8d1df1b4f2ec42a4e08e17355cf491651c SHA-256: 9eae95e2fe4e14696ef66ae666ef7699f0823576b201efed2b3fdee8a68e4ce2
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially harmful content. The document body, though heavily obfuscated, appears to be a lure related to educational topics, likely to trick users into clicking on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://ponafet.ru/wix?keyword=ap+chemistry+quantum+numbers+worksheet PDF link annotation
    • http://vevaxogejaz.scienceontheweb.net/belebonigugavozuvof.pdfIn PDF document text
    • http://missunik.space/cambridge_igcse_mathematics_core_and_extended_revised_editioncz404.pdfIn PDF document text
    • https://cdn.sqhk.co/ropobemuma/dkIziih/strategic_planning_for_nonprofit_organizations_template.pdfIn PDF document text
    • http://themarkuzmusic.com/somewhere_west_side_story_music_sheet3fzuq.pdfIn PDF document text
    • https://pizipeko.weebly.com/uploads/1/3/4/6/134611096/bakitazije_jiroveka.pdfIn PDF document text
    • http://top-salez.site/what_does_the_clock_keeps_ticking_meanf54nb.pdfIn PDF document text
    • https://tesejusijup.weebly.com/uploads/1/3/4/7/134704228/45cd8bc0d9c6.pdfIn PDF document text
    • https://vezutokabev.weebly.com/uploads/1/3/4/7/134758566/455421.pdfIn PDF document text
    • https://zoluvurodozi.weebly.com/uploads/1/3/0/7/130776250/2260597.pdfIn PDF document text
    • https://cdn.sqhk.co/rorezina/ibYTnhg/xadaxupamewamakegozugusix.pdfIn PDF document text
    • https://fafafavavilaba.weebly.com/uploads/1/3/4/8/134893162/fusewelelopik_tafotulupo_vivuvujozu_dosaro.pdfIn PDF document text
    • http://pokemonrivals.online/aircrack-_ng_free_for_windows_xppygub.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ec451167-49e0-489e-a150-d7dc0ecf9264.filesusr.com/ugd/fe0276_ab9f88ee7015408ba6a82fa580dbc6db.pdf?index=trueIn PDF document text
    • http://paxerakomis.onlinewebshop.net/constitucion_reformada_bidart_campos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bd55e50-cf7e-4c0f-a3d3-584fdd980a4e/can_a_civilian_get_tactical_training.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/390e41df-afca-4c36-88df-44dd045572db/munchkin_rules_carried_items.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caa1bd8e-a2ad-4017-9ddf-8078c08d54fd/cuantos_centimetros_tiene_un_pie.pdfIn PDF document text
    • http://xabudavadeguvo.myartsonline.com/optomcas_personal_statement_example.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07ab4d1a-25f0-4071-b972-e341b3e098f4/google_search_by_image_url_mobile.pdfIn PDF document text
    • https://09ec9d85-9312-4337-94d0-b84080e05f2e.filesusr.com/ugd/ac0094_9f58caf0a56e428b9a63b7cc7fadd654.pdf?index=trueIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD5D 5656 bytes
SHA-256: e663b36a4f10793cd0794a0a068199b5ff1c0d60ebfca7080eae9fb4f06bc8f0
font_01_sfnt_off0000e087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE087 9764 bytes
SHA-256: 1b969a64b88002c96ffdcdeb4712a8f4c1f1f36b546d59dbc76090a0f8c6308a
font_02_sfnt_off0001023a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1023A 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7

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