Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ed27c431d4bc185…

MALICIOUS

PDF

73.4 KB Created: 2021-03-04 05:54:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a88d2acf3f9706b658f3b7f1a7c98b5 SHA-1: ae9043b04c5d8a39afacb7a32a2c03c64b8af081 SHA-256: 3ed27c431d4bc1857521dbaff1c6fd20e06d2536b25b95fdf657606c572206de
96 Risk Score

Malware Insights

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

The file is a PDF that contains embedded URLs, one of which is flagged as malicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of embedded URLs suggests an attempt to redirect the user to a compromised or malicious site, potentially for credential harvesting or further payload delivery.

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://soxebez.ru/123?utm_term=language+teaching+techniques+pdf
    • https://cdn.sqhk.co/rosivapixove/gcribrt/the_seven_deadly_sins_grand_cross_descargar_pc.pdf
    • https://cdn.sqhk.co/kezavilageg/idyhjja/jugar_standoff_multiplayer_en_pc.pdf
    • https://cdn.sqhk.co/duvapegoleva/jozihQv/xuwodevedimeroninotogita.pdf
    • https://cdn.sqhk.co/puxumede/ijxgjSt/38154335287.pdf
    • https://cdn-cms.f-static.net/uploads/4393503/normal_5fd711fbc3408.pdf
    • https://static.s123-cdn-static.com/uploads/4451221/normal_5fcd8d7727451.pdf
    • https://cdn.sqhk.co/vomofizog/hdUchak/3805591424.pdf
    • https://cdn-cms.f-static.net/uploads/4369334/normal_60313310b4bc6.pdf
    • https://static.s123-cdn-static.com/uploads/4505839/normal_5ffe7a73d5c3f.pdf
    • https://cdn.sqhk.co/gapalagabig/2Pmiigf/video_editing_jobs_salary_in_dubai.pdf
    • https://cdn.sqhk.co/rojozedofaf/hhaUjjn/befukipizukejofewu.pdf
    • https://cdn.sqhk.co/jigugabopu/iiagjhf/coin_master_cheats.pdf
    • http://dujojiwasemob.mywebcommunity.org/33464086121.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zoligagomuwe.onlinewebshop.net/87329459399.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_off0000e360.bin
d08daf40c6c09e3272be55830f3089fd9529554a6cb35b71436cc2f088e367a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE360 5356 bytes
font_01_sfnt_off0000f594.bin
f2f516ee852ac9a8e690cf8677ca22a1704b471b9a655c6df42e53a772414661		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF594 10148 bytes

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