Malicious PDF — malware analysis report

Static analysis result for SHA-256 4edf2f1f526c7c46…

MALICIOUS

PDF

75.9 KB Created: 2021-04-28 07:08:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9ffe404e53470e02d9ba5409846c82e SHA-1: 48cd221a6c00da9c1105b488076d794a4809a24e SHA-256: 4edf2f1f526c7c460ceb5457b42d1f5358f8cc4914a3c77ec319a13e303d240f
96 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains an embedded URI pointing to 'https://zajinet.ru/strik?utm_term=warren+buffett+calculation+intrinsic+value', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to contain text related to financial calculations, serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://zajinet.ru/strik?utm_term=warren+buffett+calculation+intrinsic+value
    • http://pawomodom.medianewsonline.com/administracion_financiera_contemporanea_moyer.pdf
    • https://cdn-cms.f-static.net/uploads/4392474/normal_6017400ae9b63.pdf
    • http://sewukagazub.mypressonline.com/copperplate_calligraphy_free_download.pdf
    • https://lomixefewagad.weebly.com/uploads/1/3/4/5/134592496/razake_lufulufogelep.pdf
    • https://tiposowa.weebly.com/uploads/1/3/1/1/131164246/2705899.pdf
    • http://wijetaz.mypressonline.com/ks2_maths_problem_solving.pdf
    • http://pefiworawodud.mypressonline.com/pandas_select_rows_by_index_multiindex.pdf
    • https://sasadopebob.weebly.com/uploads/1/3/5/3/135324308/80bd8.pdf
    • http://tosefabebiribow.scienceontheweb.net/nazijirokugubipatives.pdf
    • http://nezowigivomi.scienceontheweb.net/websphere_application_server_tutorial_for_beginners.pdf
    • http://ruwemipuwev.mypressonline.com/induction_motor_speed_control_using_fuzzy_logic_controller.pdf
    • https://static.s123-cdn-static.com/uploads/4488103/normal_600517ffb472b.pdf
    • http://jepenufi.getenjoyment.net/2609898011.pdf
    • https://cdn-cms.f-static.net/uploads/4393362/normal_602c750f1022d.pdf
    • https://gujodoludota.weebly.com/uploads/1/3/2/6/132681740/9b363d931cd578.pdf
    • http://sifaritube.sportsontheweb.net/39242352138.pdf
    • http://jidogirikar.mygamesonline.org/kilefobaz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://desejole.myartsonline.com/67034986812.pdf
    • http://xunevonobi.epizy.com/bijonud.pdf
    • http://kurejob.epizy.com/how_do_you_adjust_the_pilot_light_on_a_gas_stove.pdf
    • http://suginuzebaluwom.rf.gd/bhavesh_joshi_superhero_song_pagalworld.pdf
    • http://tosememab.rf.gd/dakajivaridaxida.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_off0000ed11.bin
05484001a421b0e78efffff07c9c4f585a2b03eeea33932141cdad9ef1381ef4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED11 5088 bytes
font_01_sfnt_off0000fe85.bin
ed6cc8d551b148889b54ab67e752392652df552cb0d6732b6f441aec2fe4e39a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE85 10528 bytes

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