Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7647cc3252691d6…

MALICIOUS

PDF

74.9 KB Created: 2021-06-03 12:58:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63cacb1c68c0b7054fad3b315d7fdc7e SHA-1: b06991de4045af64319b5ae924ab692ac91f9bc9 SHA-256: e7647cc3252691d65973c872103744cb4f38d8ca1fe2e6b7e18a8ef7cd349530
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, and the ML classifier and ClamAV both flagged it as malicious. The document body, though heavily obfuscated, appears to be a lure related to song chords, suggesting a phishing or malware delivery attempt. The presence of embedded URLs and the nature of the detection indicate a likely attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://coretry.ru/pbw?utm_term=have+yourself+a+merry+little+christmas+piano+chords+easy
    • https://nukusiluvo.weebly.com/uploads/1/3/4/6/134612364/5494360.pdf
    • https://cdn-cms.f-static.net/uploads/4375203/normal_606be6ed0afc3.pdf
    • https://cdn-cms.f-static.net/uploads/4420924/normal_604657549d183.pdf
    • https://witatike.weebly.com/uploads/1/3/2/3/132302928/5529566.pdf
    • https://cdn-cms.f-static.net/uploads/4487206/normal_603560f09efcb.pdf
    • https://static.s123-cdn-static.com/uploads/4422897/normal_5ff833505d283.pdf
    • https://dumuwikodopod.weebly.com/uploads/1/3/4/4/134458554/xamujeruwir.pdf
    • https://static.s123-cdn-static.com/uploads/4488135/normal_5fde310d43ea4.pdf
    • https://cdn-cms.f-static.net/uploads/4390999/normal_601d9eda3aa5b.pdf
    • https://kubegagalinono.weebly.com/uploads/1/3/4/7/134714436/1a04a3754a.pdf
    • https://static.s123-cdn-static.com/uploads/4449614/normal_5fe119654a14d.pdf
    • https://cdn-cms.f-static.net/uploads/4446774/normal_6061002218438.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://risuxujuvu.pbworks.com/w/file/fetch/144504972/17529813517.pdf
    • http://jutifakukap.pbworks.com/f/aw139_rotorcraft_flight_manual.pdf
    • http://tejudafo.pbworks.com/f/afk_arena_mod_apk_unlimited_money.pdf
    • http://pamotekegopa.pbworks.com/w/file/fetch/144449727/top_video_chat_app_with_strangers.pdf
    • http://mumasenekera.pbworks.com/w/file/fetch/144416988/festival_internacional_de_musica_y_danza_de_granada_2019.pdf
    • http://fosirodovo.pbworks.com/f/51692798159.pdf
    • https://uploads.strikinglycdn.com/files/d709eb37-fae9-49de-a9b6-817469df9987/verbos_regulares_en_ingles_y_espaol_en_presente_y_pasado_simple.pdf
    • https://uploads.strikinglycdn.com/files/c5eb23aa-a115-4cd1-bf26-72c8853d6c34/the_production_of_space_chapter_1_summary.pdf
    • https://uploads.strikinglycdn.com/files/a9063626-a69e-4218-855c-e02cfe137d9f/weber_smokey_mountain_18_parts_list.pdf
    • https://uploads.strikinglycdn.com/files/4387ae88-f536-4ca7-9f8a-d9d8a59f860d/lovexifenulixogeliz.pdf
    • http://rasovuxosew.pbworks.com/w/file/fetch/144555699/download_file_samsung_usb_driver_for_mobile_phones.zip.pdf
    • https://uploads.strikinglycdn.com/files/d17db307-eb80-4e95-80a4-27ed5ccbc199/99882962309.pdf
    • http://bupataved.pbworks.com/w/file/fetch/144423726/homophones_lesson_plan_grade_4.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_off0000e700.bin
ecb5365604685c686b94291dc3d42d14978e6b70a3628c2bfdc4365c40f874d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE700 5520 bytes
font_01_sfnt_off0000f9a5.bin
5a7432e65b4788be1c40de3efe650e56657c0e0a2fbd794e87a5da20607ae0c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A5 10352 bytes

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