Malicious PDF — malware analysis report

Static analysis result for SHA-256 acb2c82b848bd9e4…

MALICIOUS

PDF

69.7 KB Created: 2021-01-09 18:02:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2c4878f63420380a641d4f245a0dcc46 SHA-1: dcd0150c75bbb90ea27552ebac6c84008848bebb SHA-256: acb2c82b848bd9e4893466fc153a01a6a311d318eaf5e7e288da894929547ef2
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to a suspicious domain, which is likely used to deliver a secondary payload or conduct phishing. The document body, though heavily obfuscated, suggests a lure related to 'sea animal colouring sheets', indicating a social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/aws?utm_term=sea+animal+colouring+sheets
    • https://cdn-cms.f-static.net/uploads/4495042/normal_5fba42e55185e.pdf
    • https://cdn-cms.f-static.net/uploads/4391319/normal_5f91b75bd9160.pdf
    • https://cdn.sqhk.co/vojogalu/sXYm0je/fojexej.pdf
    • https://cdn.sqhk.co/rarirawibowo/dXjehg6/freedom_mortgage_wholesale_careers.pdf
    • https://cdn.sqhk.co/vowibesep/hcrRf67/best_shoot_em_up_games_ps4_2019.pdf
    • https://static.s123-cdn-static.com/uploads/4481286/normal_5fcae87330dee.pdf
    • https://cdn-cms.f-static.net/uploads/4408993/normal_5fa5beb73d3a4.pdf
    • https://static.s123-cdn-static.com/uploads/4445534/normal_5ff69abe7fccf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/woxojuxafopuv/65386677197.pdf
    • https://uploads.strikinglycdn.com/files/d929083d-a8c5-4645-ad41-58f928e135b7/law_and_order_svu_logan_paul.pdf
    • https://s3.amazonaws.com/fasanag/guronurasepak.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_off0000d4e7.bin
628edc2b91e2227e70606cd0c7d5bf33f6d521af2ed59c3138484af8eb9dcb6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4E7 5316 bytes
font_01_sfnt_off0000e6c9.bin
d67355d8269e7b8dba6f35c6b0b0c590e0c2583e53a42e6fd17ad678a55f8b91		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C9 10456 bytes

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