Malicious PDF — malware analysis report

Static analysis result for SHA-256 3df06070a98277c3…

MALICIOUS

PDF

75.8 KB Created: 2021-02-14 18:51:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8452bb96d053dab64e0a3d37b730288 SHA-1: 33a881e51644550ab352f9e8d4a5fa3b330eece8 SHA-256: 3df06070a98277c3470919a84c1e00cf4072e24b6f321b28be681e04b5ece2ff
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 specific detection name indicating phishing and trojan characteristics. An external URI, 'https://crophysi.ru/123?utm_term=cry+baby+janis+joplin', was extracted, suggesting a potential phishing lure or malware download destination. The document body is heavily obfuscated and unreadable, but the presence of embedded URLs and the overall verdict strongly indicate a malicious intent, likely related to spearphishing.

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://crophysi.ru/123?utm_term=cry+baby+janis+joplin
    • https://static.s123-cdn-static.com/uploads/4447641/normal_5fe514ac884b4.pdf
    • https://taxufutusa.weebly.com/uploads/1/3/4/5/134514166/wakegadupevago.pdf
    • https://cdn.sqhk.co/zofonabiz/Dhcjiig/dj_marshmello_cake_ideas.pdf
    • https://static.s123-cdn-static.com/uploads/4366341/normal_6008317ab9c33.pdf
    • https://pixiguva.weebly.com/uploads/1/3/2/6/132681827/1535703.pdf
    • https://cdn.sqhk.co/fijufupuga/hyheDgj/6077399671.pdf
    • https://jenodefutufute.weebly.com/uploads/1/3/4/3/134373351/zolur.pdf
    • https://cdn.sqhk.co/nuvexajamu/hfRjfsJ/disney_princess_toddler_dress_up_trunk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zalisujezajaje/7955352977.pdf
    • https://s3.amazonaws.com/zamuriza/playing_card_java_game.pdf
    • https://s3.amazonaws.com/tosego/34058344946.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_off0000ed9d.bin
d6c8eb9378d12416770d5e96957d768a714996847bee5cbc988f99009f2f1b0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED9D 5036 bytes
font_01_sfnt_off0000fed3.bin
4e4c7b1890b3a663341260a426b41d305c3ab197c3242221986c90f32966b30d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFED3 10484 bytes

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