Malicious PDF — malware analysis report

Static analysis result for SHA-256 36195bcc29c3398a…

MALICIOUS

PDF

75.3 KB Created: 2021-07-15 23:08:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e965b0c7d7dc25cb442376d00847d699 SHA-1: da9c250bf79c1487a4b410285b7a7534f6cb69a6 SHA-256: 36195bcc29c3398ab1dceb7bc964e6fe6fad9434d875a17087f3f31180613ff7
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by a ClamAV signature and an ML classifier. It contains an embedded URI that points to a URL, which is likely intended to trick the user into visiting a phishing site. No scripts were extracted, but the presence of an embedded URI suggests a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8972

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://feedproxy.google.com/~r/razvivatel/yapz/~3/4Ji06Fp1PxY/square?utm_term=best+martial+arts+for+grappling
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60edf9e9e635d71664649e6e/1626208745291/the_mighty_mighty_bosstones_question_the_answers.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7d31b52059f1ec1e3d92c/1625805595346/what_is_physics_answer.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ede8521f6a95122870cf50/1626204242964/auto_liker_for_fb_apk_free_download.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e7897548fdc259403c013c/1625786741225/10273776386.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee1df6f6c772366d2b9edf/1626217974879/razagerenoguzoje.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e873d51b378f258c63ea56/1625846741289/vesuxus.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_off0000c850.bin
72b8af4750b4c6232d6a04316eb67f2424f5184df06ec5baf57e70a37383e6f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC850 15752 bytes
font_01_sfnt_off0000f04b.bin
6578210afe43b87d32c7ff56bfdd768cd46a075bc26aa4223a284e796d12bc43		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF04B 10756 bytes
font_02_sfnt_off00010905.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10905 16792 bytes

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