Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b6261158d3f79ce…

MALICIOUS

PDF

82.5 KB Created: 2021-03-25 00:03:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bcb90c7bfa95f19cb7891bb35bfb2288 SHA-1: 185fb308074a280265277ab5a7f07242bc744a71 SHA-256: 8b6261158d3f79cef4ef6b5d0f40e4c8367edb9ec26f7b2aa35e82b143eb46a5
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL that leads to a suspicious domain, likely intended to trick the user into downloading further malware or revealing sensitive information. The document body, though heavily obfuscated, contains references to the URL's keyword and the authoring application, suggesting a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/award?keyword=neoliberal+globalization+pdf
    • https://cdn.sqhk.co/bavimimo/rBia8LX/download_bios_epsxe_for_android_gratis.pdf
    • https://cdn.sqhk.co/wofazexej/jdjhjdL/snake_simulator_games_online.pdf
    • https://cdn.sqhk.co/xixewebirike/fyljjif/1332036845.pdf
    • https://cdn.sqhk.co/dogojaseziwo/hbheuhg/status_video_download_hd_whatsapp.pdf
    • https://cdn.sqhk.co/xaranoraf/8ghMhbI/weight_conversion_pounds_ounces_to_kilograms.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/cd1f5cc4-3197-452f-8573-3d58af764e59/dudufodigoxepe.pdf
    • http://gulesovel.epizy.com/html5_textbox_type.pdf
    • https://uploads.strikinglycdn.com/files/288e0a8c-1907-48b7-881e-3efe301f795f/74459387094.pdf
    • https://uploads.strikinglycdn.com/files/9f3f6f67-2717-4ea0-b4f4-002f9fc4b523/10048395532.pdf
    • https://uploads.strikinglycdn.com/files/4e193960-be79-4cf9-b56c-106bba678e80/athenaze_book_1_free.pdf
    • https://uploads.strikinglycdn.com/files/03cd8a34-6023-42ef-b764-1c8ab0c56821/74118164308.pdf
    • https://uploads.strikinglycdn.com/files/88fee6c3-84b8-458f-9837-d5e2daaff319/the_elements_of_moral_philosophy_8th_edition_citation.pdf
    • https://s3.amazonaws.com/tasufagijaremo/how_do_i_file_a_notice_of_removal.pdf
    • http://xusonusoxe.epizy.com/bsc_mechanics_notes_download.pdf
    • https://uploads.strikinglycdn.com/files/cb4df332-969b-43f1-b63b-11d3c5b28c01/36836001786.pdf
    • https://uploads.strikinglycdn.com/files/8935ae73-46f5-4400-b960-ace5a458765c/interior_designing_courses_in_canada.pdf
    • https://s3.amazonaws.com/kibavutibeved/vodekarinadewuloxuk.pdf
    • https://uploads.strikinglycdn.com/files/d84dd421-bb0f-4358-a1ea-1b58c5060a31/how_to_turn_on_bosch_tankless_water_heater.pdf
    • https://s3.amazonaws.com/paropabaru/schaums_outlines_physics.pdf
    • https://uploads.strikinglycdn.com/files/8db7ce85-de80-401c-bbbb-27bf4558e915/xubudakove.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_off000100d5.bin
b87e58d607c847dd058ba2b7f8bc2c17af9dfe5282d34bf24ff5c369cb7b1d46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100D5 5188 bytes
font_01_sfnt_off00011293.bin
f3d646ef02e24f82b2dd1a631b658c06d572c7de4250e76b950582dc52773aab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11293 12696 bytes

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