Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a8c88a3123a78f4…

MALICIOUS

PDF

80.9 KB Created: 2021-03-21 01:05:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7eadb0864d13aa950c6037cee8647d87 SHA-1: 6c6afea771ffddaccd09b62213e2eafa2e38ba4a SHA-256: 3a8c88a3123a78f4d0dffe10725c1e30379de1a8bf2646bbbb21a604477c6e5f
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains keywords that might be used in a lure, and the embedded URI suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://leonvi.ru/wix?keyword=bushnell+backtrack+hunttrack
    • http://sikevemekoma.mypressonline.com/complete_javascript_tutorial_free_download.pdf
    • https://cdn.sqhk.co/mogizufofuj/g0Jvhav/wood_cnc_machine_for_sale_near_me.pdf
    • https://cdn.sqhk.co/jirudumom/gqzjdjd/siburifaxojadutilemeb.pdf
    • https://cdn.sqhk.co/rujojumex/eicJggk/lords_online_shop.pdf
    • https://cdn.sqhk.co/ravuviwidi/cjihbmo/tijapujesoliwaxotesefe.pdf
    • http://tonedomopoja.scienceontheweb.net/weekly_work_schedule.pdf
    • http://midimox.getenjoyment.net/7633630381.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/zunaporam/how_to_pair_polk_soundbar_with_iphone.pdf
    • https://s3.amazonaws.com/titugome/85581831123.pdf
    • https://uploads.strikinglycdn.com/files/18659df5-c08d-4a9b-893b-1ac3f06e7e31/what_is_supreme_mathematics_used_for.pdf
    • https://uploads.strikinglycdn.com/files/5815b2e7-21db-4475-b3fc-ef2ebf3181f9/how_can_you_reset_your_voicemail_password.pdf
    • https://s3.amazonaws.com/xesigeze/disattivare_aggiornamenti_automatici_android_samsung.pdf
    • https://uploads.strikinglycdn.com/files/504c42e5-3dea-4746-9bac-a96bd3cd59aa/subway_surfers_mod_apk_arivleri_android_oyun_club.pdf
    • http://temolujipu.myartsonline.com/carpentier_s_reconstructive_valve_surgery_download.pdf
    • https://uploads.strikinglycdn.com/files/c5471dc5-d949-44e5-b997-e112794536eb/42080488210.pdf
    • https://uploads.strikinglycdn.com/files/19880bc7-789b-475a-916c-d8951fa4c4a4/30902936925.pdf
    • https://uploads.strikinglycdn.com/files/d05649c0-a8d5-484e-9e10-b333bbd94026/internal_auditing_training_courses.pdf
    • https://s3.amazonaws.com/xupovobejanam/que_es_la_psicologia_juridica.pdf
    • https://s3.amazonaws.com/xisefowu/acrobat_reader_gratis_em_portugues.pdf
    • https://s3.amazonaws.com/pujirageg/xizukikuvopabuwobisovuxi.pdf
    • https://s3.amazonaws.com/zafijukopa/definitive_sentencing_guidelines_burglary.pdf
    • https://uploads.strikinglycdn.com/files/1c7892ec-e056-4a3c-a29b-c00bd3776588/digital_marketing_courses_london_ontario.pdf
    • https://uploads.strikinglycdn.com/files/62e524eb-091e-4448-b91a-3d66cb2d055d/horizon_zero_dawn_game_guide_book.pdf
    • https://s3.amazonaws.com/zuguvoxoki/15891162563.pdf
    • https://uploads.strikinglycdn.com/files/1e06c867-2015-4963-8157-4ed3f00c0af8/kirby_sentria_g10d_shampooer.pdf
    • https://s3.amazonaws.com/vufupu/dahao_emcad_embroidery_pattern-_design_system.pdf
    • https://s3.amazonaws.com/loneminovu/poster_board_design_template.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee3c.bin
5e1aa1855ce14e02d56ae0fb5adb2efbb31517641a9ed8e25ed107d43843ef31		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3C 4864 bytes
font_01_sfnt_off0000feae.bin
38d8343979556b6e15f75b3b0d82319b140efdcec5deb23bccd1e8eb468a6d22		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEAE 12724 bytes
font_02_sfnt_off000127d6.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127D6 4324 bytes

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