Malicious PDF — malware analysis report

Static analysis result for SHA-256 014606c9199d8896…

MALICIOUS

PDF

84.7 KB Created: 2021-03-26 07:27:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6ad0867bdf2299d1eb61170959f150b SHA-1: e3d9755573ac6593b7f94f19b3884ea11c67fcac SHA-256: 014606c9199d8896ccd0544208ae2c3f20d802f94a02e258ee25d7dcc571e0fc
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it uses a social engineering lure to trick users into installing a browser update or extension. The embedded URL points to a suspicious domain, likely serving the malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://botokaw.ru/123?utm_term=adobe+acrobat+reader+10+software+free
    • https://cdn.sqhk.co/vekosozob/azjhhhi/kadovezo.pdf
    • https://cdn.sqhk.co/bajafigotuvi/vQjfXAS/aquarium_fish_sell_in_karachi.pdf
    • https://cdn.sqhk.co/jojikoxazew/ijjaQgf/real_football_games_2012.pdf
    • http://toreret.scienceontheweb.net/general_characteristics_of_archaebacteria.pdf
    • https://cdn.sqhk.co/seponidozit/jgojjdY/name_this_song_game_online.pdf
    • http://bimizuzi.sportsontheweb.net/55803725609.pdf
    • http://zugasanuko.getenjoyment.net/angular_6_convert_html_to.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/davolazupivowi/mogudikutexotewazet.pdf
    • https://uploads.strikinglycdn.com/files/32ad41a9-2242-4306-bc3a-19d984e1d503/70633362084.pdf
    • https://uploads.strikinglycdn.com/files/b90f14e5-afb8-4215-8c9d-a571e2fb474a/32272189276.pdf
    • https://uploads.strikinglycdn.com/files/eac5b614-7d67-429e-9696-ad81b15c8682/84296690653.pdf
    • https://uploads.strikinglycdn.com/files/4a339a7f-cc88-49b1-b029-c32def13f763/44296090246.pdf
    • https://uploads.strikinglycdn.com/files/c46fa722-cc01-4fa9-9a5c-8e2ff0f19d54/tebofoborimijonom.pdf
    • https://uploads.strikinglycdn.com/files/bb5c44f0-860b-4338-abe4-cbdb99d7895c/dd_5e_players_handbook_download.pdf
    • https://uploads.strikinglycdn.com/files/7b25576a-5cdf-422b-afcc-7a16efc8f5a4/subaru_ea190v_3100_psi_pressure_washer_parts.pdf
    • https://uploads.strikinglycdn.com/files/4967e060-ce33-4030-a7a9-dead516d5fbf/2834199823.pdf
    • https://uploads.strikinglycdn.com/files/50943e00-18b2-4ba8-b918-98095f44115b/58611012083.pdf
    • https://s3.amazonaws.com/likerajatob/92288460461.pdf
    • https://s3.amazonaws.com/tobovunoberiki/latex_code_for_report.pdf
    • https://uploads.strikinglycdn.com/files/f273f2ed-f7c7-48a8-9cff-eed1ab029758/xenifukut.pdf
    • https://uploads.strikinglycdn.com/files/20a809c8-8f32-4627-9445-286d1d5a2571/what_is_meant_by_critical_review_literature.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d35.bin
4319a627eeebd81634b450ac5120ea7ffc592026cee74b9e922bdcb192f6273a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D35 5400 bytes
font_01_sfnt_off00011fb3.bin
f1de3acd7de7dba88576ac2d89dfd45a325b54e229b247e04ebe9c0a3103b975		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB3 11060 bytes

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