Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ec0e5ee2bc813ec…

MALICIOUS

PDF

80.5 KB Created: 2021-02-15 16:56:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 753dffd1aeb477bbe4694d54ac69320d SHA-1: 7c3a59780595019b13c0e5209a67aafc1df1382d SHA-256: 3ec0e5ee2bc813ec3f23ba8f45a0941b472b62a5d156a81d92efc09b1df69a78
96 Risk Score

Malware Insights

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

The file was identified as malicious by ClamAV and an ML classifier, with heuristics indicating the presence of an external URI. The embedded URL, https://leonvi.ru/wix?keyword=the+navajo+medicine+man+remedy+pdf, likely leads to a phishing site. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious web resource, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=the+navajo+medicine+man+remedy+pdf
    • https://cdn.sqhk.co/zimopaji/g418Aih/home_makeover_hidden_object_game_play_online.pdf
    • https://cdn-cms.f-static.net/uploads/4411919/normal_6017a9e7e17a2.pdf
    • https://cdn.sqhk.co/toromerepowa/jjZbigb/nuzagerosuwamebega.pdf
    • https://cdn-cms.f-static.net/uploads/4424689/normal_600a94a5129bd.pdf
    • http://ibkreactiva2020.com/skip_bo_online_multiplayer_spielen9ywem.pdf
    • https://cdn-cms.f-static.net/uploads/4418391/normal_600f640412e5d.pdf
    • https://cdn.sqhk.co/rabovafom/ja3UhbQ/rally_s_menu_springfield_ohio.pdf
    • https://static.s123-cdn-static.com/uploads/4463824/normal_5fcbf8c63695f.pdf
    • https://cdn-cms.f-static.net/uploads/4383800/normal_6010f1e1bd10f.pdf
    • http://pubgucbayim.com/dolafaparumakoravapajipwj7.pdf
    • http://dvigatel.guru/33616618515w8mrc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/datarofapakil/11595510241.pdf
    • https://s3.amazonaws.com/babuxufarizuxur/50489318325.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_off0000fc9a.bin
845bba37340f203003af5189f48edc7e7b5e9de917032218a4ba55f510c7f449		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9A 5372 bytes
font_01_sfnt_off00010ecd.bin
4715e7a3bc70766cde98530f00648ca132b1eb78e1b23cebfbe3f52cb34c37b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10ECD 11388 bytes

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