Malicious PDF — malware analysis report

Static analysis result for SHA-256 607e24835a1339dc…

MALICIOUS

PDF

76.7 KB Created: 2021-04-05 14:07:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f487aaee514e598341613533ea17d1a1 SHA-1: 9587046579c8f2a0d92ec8a0ef0714326053a052 SHA-256: 607e24835a1339dcc1ffb4f11e719b9b6455cdb799dacac944bd4b5376ee9aaa
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, with a high risk score. It contains an embedded URI pointing to 'https://jacksth.ru/award?keyword=ball+badminton+game+rules+pdf', suggesting a lure to a phishing or malware distribution site. While no scripts were explicitly extracted, the PDF_URI heuristic indicates an attempt to redirect the user, likely via embedded JavaScript, to a malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jacksth.ru/award?keyword=ball+badminton+game+rules+pdf
    • https://cdn.sqhk.co/rizijuwet/bighfNn/powevitinowuxafusu.pdf
    • http://goromeo.club/vuxepodifigedajufatorajim3vucz.pdf
    • https://juxibawazorar.weebly.com/uploads/1/3/3/9/133997202/tesumoxoj.pdf
    • https://nupepapuk.weebly.com/uploads/1/3/1/4/131484133/sizunusilaluw-jisegime-kozetuxamowama-vukusedof.pdf
    • https://cdn.sqhk.co/sepunaro/5jiR45E/real_need_for_racing_speed_car_mod_apk.pdf
    • http://zanartcc.net/btw_aangifte_formulier_engelso2xjc.pdf
    • https://cdn.sqhk.co/pinufizugal/Sccsphg/video_er_online_by_link.pdf
    • http://wanebiwadu.iblogger.org/cahier_de_vacances_gs.pdf
    • http://scrlt.xyz/assessment_in_education_slideshare4txoo.pdf
    • https://gapepaweduli.weebly.com/uploads/1/3/5/4/135400658/rotivavinojib.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vurisadazuxe.epizy.com/vedoxawudobuxigitoza.pdf
    • http://xavimon.epizy.com/75648958051.pdf
    • https://uploads.strikinglycdn.com/files/0b1c6593-9fa9-41ff-8804-2ea420cd1f12/principal_types_of_business_activity.pdf
    • https://s3.amazonaws.com/wenobagupexekap/moxilug.pdf
    • http://kukalofawofami.epizy.com/43463561674.pdf
    • https://uploads.strikinglycdn.com/files/6d1a6864-f00a-48f1-a74d-8e2f377f2f71/wilujewumalulogovigobufo.pdf
    • https://uploads.strikinglycdn.com/files/f079c9f4-2376-4899-8716-2dc34fc4e36f/lisajagowamimidusimejap.pdf
    • https://s3.amazonaws.com/risisipajole/c._a._t_uniforms_philippines.pdf
    • https://uploads.strikinglycdn.com/files/58929138-1640-4392-a4a0-fc8beafee8a9/nagalizulegumilimutuji.pdf
    • https://uploads.strikinglycdn.com/files/12e30ffd-75c4-4e3d-88c9-696532cbdf84/writing_quadratic_equations_in_standard_form_examples.pdf
    • http://mikafametulere.epizy.com/d_d_3._5_character_sheet.pdf
    • https://s3.amazonaws.com/supefujoxopubu/49262442885.pdf
    • https://s3.amazonaws.com/fukepez/microsoft_online_calendar_templates_2018.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_off0000ecec.bin
b96e79df87c8c6854dc0d31a129bd3436091fbc011b30665d7db26ea5f3d0573		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECEC 5552 bytes
font_01_sfnt_off0000ffb0.bin
529efd95ecd10a4355b872cdf5126193f673f5f6c419a80647d4e80dc5f955e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFB0 11172 bytes

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