Malicious PDF — malware analysis report

Static analysis result for SHA-256 30314a3f165bcd06…

MALICIOUS

PDF

79.2 KB Created: 2021-07-12 22:03:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0329c3eaa716436df81071541db9d1df SHA-1: 6dfd5885a451195ae4efaa3a57d7ff8230b4d119 SHA-256: 30314a3f165bcd06e354ac1c19d2ef975b8cafa733ece79c90e83a460aab21d0
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and contains an embedded external URI pointing to a suspicious domain. While no scripts were directly extracted, the presence of an external URL suggests an attempt to redirect the user to a malicious site, likely for phishing or to download a secondary payload. The document body is heavily obfuscated, preventing a clear understanding of its content, but the overall structure and embedded URI are strong indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier clean score 0.1454

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://krisoc.ru/square?utm_term=ps+touch+apk+download+ios
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e80ef2d56f0f3612732ffc/1625820914249/1_pound_indian_rupees.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e848f977c56e0f704b161b/1625835769401/debutewu.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4a4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A4 16792 bytes
font_01_sfnt_off0000ecbb.bin
9573961b8fca7ece541ddfcd485768a13b3b2d7ffa40b8f38a1c2633c93833bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECBB 10656 bytes
font_02_sfnt_off00010529.bin
f4944cf94330172b027c765a066a743f05b0fbcc8df10b62a2e5365d37e5aec4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10529 16960 bytes

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