Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e4766d25e64f5a0…

MALICIOUS

PDF

81.2 KB Created: 2021-03-17 05:13:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 8885108d23225d812225511fa0b8e413 SHA-1: 466495e7db14b5642af5748a28b0e16735118e44 SHA-256: 2e4766d25e64f5a067771be2fb8826369369db73712ba7c1599158e0b52d3b75
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that redirects to a suspicious URL, likely for phishing or malware distribution. ClamAV detection and ML classification strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'mark klimek notes 2019 pdf', aiming to trick users into visiting the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=mark+klimek+notes+2019+pdf PDF link annotation
    • https://cdn.sqhk.co/rurokusulos/UZHi7rn/idle_ants_simulator_game_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/wekonexiw/flmig3o/star_quiz_galaxy_fan_trivia_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/vazoguzo/jgjfFhc/kezupisa.pdfIn PDF document text
    • http://witaxolexigabi.mywebcommunity.org/sunny_baudelaire_description.pdfIn PDF document text
    • https://cdn.sqhk.co/sefibenip/hDKX2gd/roy_worldwide_height.pdfIn PDF document text
    • http://zevewidojodot.mywebcommunity.org/xojevitagiremikeb.pdfIn PDF document text
    • http://juwoniki.getenjoyment.net/painting_stained_kitchen_cabinets_without_sanding.pdfIn PDF document text
    • https://cdn.sqhk.co/miloxuso/b5gh6Wp/buvulisoti.pdfIn PDF document text
    • http://nigodofifulo.scienceontheweb.net/71543347568.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bevarolimesale/parent_brag_sheet_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d17d4759-1014-41d3-9729-8a1a34e2311d/58672679814.pdfIn PDF document text
    • http://merovuditipin.onlinewebshop.net/risijimebifimesudesaz.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/31895200311.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/madagascar_visit_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/744c0b6e-53dd-4b6c-afdd-b1192ebc0c1f/french_exercises_for_beginners_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a974b73f-55c6-412a-95d7-f47966853fa5/tipos_de_amenazas_que_se_analizan_en_un_plan_de_emergencia.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/happy_birthday_bunting_flag_free.pdfIn PDF document text
    • http://rixibedi.onlinewebshop.net/fovulufunitibe.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/gexeguxirozu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a1375bd-2e77-4868-8a25-f704555d05cc/active_passive_voice_rules_chart_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/what_is_the_book_of_numbers.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_off0000f058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF058 5736 bytes
SHA-256: b8d9d69f88cbd36e542593e76e3366fc504166fe45f1195f5ca81e945da7f649
font_01_sfnt_off000103cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103CC 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00010c5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5A 12292 bytes
SHA-256: 6efb79ee78eacc89f415107b8a901407761ff11809a14ffd0e363445c80b2919

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