Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f5941369a5d4560…

MALICIOUS

PDF

79.9 KB Created: 2021-07-16 03:33:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 803e33915ae75abcc4a7ffeb72b0f228 SHA-1: a30d37e9db5189423e6665bf50a1f33b5ee837ae SHA-256: 3f5941369a5d4560f20183c764254633270a749c261d7c5c7182bd622f96800c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'huntic.ru', which is likely a phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6166

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://huntic.ru/square?utm_term=drowsiness+in+diabetic+patients
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8b4c25b38d46d4e13ad5e/1625863362415/munodulodavonizavopu.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec85b58300fd66e19686e9/1626113461891/touch_me_nots_urban.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f0cc06c9cf4d400006ba34/1626393606576/34669435323.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60eda7e15860d606f4835423/1626187745349/82988681612.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_off0000d7eb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7EB 16792 bytes
font_01_sfnt_off0000effd.bin
49d31eefd42b29e1bd02a80923c61a6705efa61e0d13ad104b3b45791d3c7b35		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFD 16716 bytes
font_02_sfnt_off00011b61.bin
4baf4c05e1cbe95b3e6938e4579739d707756facaa32243a0bf377cad69a60f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B61 10688 bytes

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