Malicious PDF — malware analysis report

Static analysis result for SHA-256 10e74d3dd331e6db…

MALICIOUS

PDF

74.6 KB Created: 2021-03-18 02:23:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68faef93a4e467a681ab8321f6f3d85e SHA-1: 768326c58ab05d83dd5f0a873237009bc778c20d SHA-256: 10e74d3dd331e6dbdd4410f6a3aa238028ff4a5a1d7683a6d83bc342f25a43cd
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL pointing to a suspicious domain, identified by heuristics as an external URI and flagged by a machine learning classifier and ClamAV as malicious. The document body, though heavily obfuscated, contains text related to electronic signatures on PDFs, suggesting a lure to trick users into visiting the malicious URL. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://nipisod.ru/award?keyword=apposer+une+signature+%25C3%25A9lectronique+sur+un+pdf
    • https://static.s123-cdn-static.com/uploads/4459631/normal_5feebd8e7b341.pdf
    • https://cdn-cms.f-static.net/uploads/4451229/normal_601aacb1eaadc.pdf
    • https://cdn.sqhk.co/kanemili/jhijiB0/bingo_smile_free_bingo_games.pdf
    • https://cdn-cms.f-static.net/uploads/4483071/normal_604bc46a7e296.pdf
    • https://cdn.sqhk.co/dazanukisafa/Djdqiet/rassemblement_scout.pdf
    • https://cdn.sqhk.co/xulawajikigi/jbhbtjc/18034923731.pdf
    • https://cdn.sqhk.co/kigimole/tijwhjg/6185455930.pdf
    • http://guroxufe.iblogger.org/business_plan_boutique_hotel.pdf
    • https://static.s123-cdn-static.com/uploads/4477886/normal_6003b2220fb59.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sajatesawodiji/archicad_free_32_bit.pdf
    • https://uploads.strikinglycdn.com/files/3c54dbfa-c4d4-4588-9812-f0cb6703f846/karns_church_of_christ_sermon_outlines.pdf
    • https://s3.amazonaws.com/juzowilipi/funcion_del_sistema_endocrino_en_los_animales_resumen.pdf
    • https://s3.amazonaws.com/babuxufarizuxur/bookkeeping_general_ledger_template.pdf
    • https://s3.amazonaws.com/dosalapasenow/an_nbfc_full_form.pdf
    • https://s3.amazonaws.com/nawosineromigi/giwalafemufiv.pdf
    • http://madulok.epizy.com/alimentacion_complementaria_minsa_2020.pdf
    • https://uploads.strikinglycdn.com/files/1710578b-36cd-4d3d-8135-470b155ddd8f/letania_del_rosario_catolico_completo.pdf
    • https://s3.amazonaws.com/bubeto/writing_a_book_report_3rd_grade.pdf
    • https://s3.amazonaws.com/nakuzafol/25421423697.pdf
    • http://siwomiwededu.epizy.com/smartsheet_forms_multiple_selection.pdf
    • https://s3.amazonaws.com/vavale/simple_flower_images_hd_wallpaper.pdf
    • https://s3.amazonaws.com/tugumeb/jupibale.pdf
    • https://s3.amazonaws.com/nigimul/ellingham_diagram_questions_and_answers.pdf
    • https://uploads.strikinglycdn.com/files/74423dd1-3480-482f-84ab-9ae82b35a79e/30868874232.pdf
    • https://uploads.strikinglycdn.com/files/69708e39-fe5b-4a81-a32b-e86bb06443fd/xuwoxemo.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_off0000e06e.bin
b71b7716eeba75d64ac19e29b3c744605f00b58c7b232ca42b4c83e53b6109b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE06E 5580 bytes
font_01_sfnt_off0000f329.bin
b6f27b6373b714884e4a82e7b8935e8318486252147995ffee35ab9b45278e7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF329 12120 bytes

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