Malicious PDF — malware analysis report

Static analysis result for SHA-256 9775ae973c38a05b…

MALICIOUS

PDF

84.1 KB Created: 2021-03-14 14:57:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f02e169777c43d21143df5665446eef8 SHA-1: ea20a2a060e685d1e5f303bdaa16da149712ff38 SHA-256: 9775ae973c38a05bae3bf1c9c55a22efb407943d8bad673ea30ed3baab76740e
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, 'kuzutuzo.ru', which is likely used to host a malicious payload or phishing page. The document body, though heavily obfuscated, suggests a lure related to a manual, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://kuzutuzo.ru/wix?keyword=rca+by+telefield+manual+25201re1-a
    • http://dinesan.iblogger.org/29648706884.pdf
    • https://cdn.sqhk.co/janurisu/difjiE0/artillery_sidewinder_x1_hotend_upgrade.pdf
    • http://kujamemapevubu.mypressonline.com/girovadisalozulip.pdf
    • https://cdn.sqhk.co/geroterunetu/PEhbheF/minecraft_launcher_premium_download_free.pdf
    • https://cdn.sqhk.co/radofufalam/eLMQVGX/ombre_nails_coffin_pink.pdf
    • https://static.s123-cdn-static.com/uploads/4378836/normal_60080a57a75f4.pdf
    • https://cdn-cms.f-static.net/uploads/4498324/normal_6039b8bf84556.pdf
    • http://zixivudu.getenjoyment.net/sample_application_letter_for_any_vacant_position.pdf
    • https://cdn.sqhk.co/somisafeg/ckhe1xA/disney_princess_charm_school_dress_up_games.pdf
    • https://cdn.sqhk.co/vawadawuleja/ggkQmRT/3d_snake_tattoo_on_hand.pdf
    • http://wapadax.scienceontheweb.net/46798329071.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jobifizokugo.rf.gd/quadratic_equation_questions_and_answers_for_bank_exam.pdf
    • http://zotuxegusam.epizy.com/savewugiririxenabexolev.pdf
    • https://s3.amazonaws.com/litunux/tevetenusatuf.pdf
    • https://s3.amazonaws.com/sezebepit/nojawitodeb.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_off0001098b.bin
8548f046b6be6c3b94ba47c86bf47345075342e67943022aa517caa277bbeb69		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1098B 5720 bytes
font_01_sfnt_off00011d09.bin
0d843529a7f2d6cf5cda3fdf378cfb5e9f751180ad74c561b6cbaaa61b264e48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D09 11428 bytes

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