Malicious PDF — malware analysis report

Static analysis result for SHA-256 536eef04071104a7…

MALICIOUS

PDF

97.3 KB Created: 2021-01-10 10:05:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa116a327cfbbd1a63be89a43f3dd8e4 SHA-1: 6abc9444d5ef0bd84104c7fcfa37c33b5726a1b5 SHA-256: 536eef04071104a7571349ef1c4ec1c3fae0b24ad85ffec4ff736d6219585ee2
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that directs to a suspicious domain, likely intended for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to exploit users by directing them to malicious content.

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://trafffi.ru/123?utm_term=life+under+stalin+primary+source
    • https://cdn.sqhk.co/dilizilozok/8gegcWl/dominoes_falling_clipart.pdf
    • https://static.s123-cdn-static.com/uploads/4500889/normal_5fc7c567b99b5.pdf
    • https://site-1167928.mozfiles.com/files/1167928/chocolate_cake_recipe_with_dark_muscovado_sugar.pdf
    • https://cdn.sqhk.co/vebiziwob/Jhcjcpr/56971970475.pdf
    • https://site-1211506.mozfiles.com/files/1211506/57053037556.pdf
    • https://site-1196011.mozfiles.com/files/1196011/56111767350.pdf
    • https://cdn.sqhk.co/goluxewimabu/7vgcpYU/highway_racing_car_mod_apk.pdf
    • https://site-1173313.mozfiles.com/files/1173313/vumuko.pdf
    • https://cdn-cms.f-static.net/uploads/4369304/normal_5f88a85e12175.pdf
    • https://site-1177911.mozfiles.com/files/1177911/94108087382.pdf
    • https://site-1175287.mozfiles.com/files/1175287/vampires_vs_the_bronx_2020_cast.pdf
    • https://site-1168221.mozfiles.com/files/1168221/hockey_teams_near_me.pdf
    • https://cdn-cms.f-static.net/uploads/4380223/normal_5f8e7fc99e5ae.pdf
    • https://cdn.sqhk.co/ludozenidi/QgcqwiN/how_to_speak_english_fluently_free_course.pdf
    • https://site-1200104.mozfiles.com/files/1200104/nadobexezejado.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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_off000140d7.bin
1ccfdecd074542729b9e6196504f8a291378de007f20f7436b7bbe4dfe2ad809		 pdf-font-stream PDF embedded font (sfnt) at offset 0x140D7 5344 bytes
font_01_sfnt_off00015301.bin
3def4c3beef00964f384145567623a2de2b5b9e86423cc3a1ac2f69104974b31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15301 11068 bytes

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