Malicious PDF — malware analysis report

Static analysis result for SHA-256 5da107c1384fe212…

MALICIOUS

PDF

307.6 KB Created: 2015-11-06 14:03:19 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 6b1b147878e029c1ac7c271d79f4ac89 SHA-1: 0547aa455d9a0caf343ca1ab5eff8a23226dbed7 SHA-256: 5da107c1384fe212960279c5f37a8a920cce2fb70c93516ad3a05e345e0a3e4b
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'taurus-tg.ru', which is likely the primary malicious component. While no scripts were explicitly extracted, the PDF structure and the presence of an external URI suggest it functions as a dropper or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7490

Heuristics 3

  • ClamAV: Pdf.Dropper.Agent-9164916-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9164916-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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 http://taurus-tg.ru/?nnr&keyword=sergdriver+%D0%BE%D0%B1%D1%80%D0%B5%D1%87%D0%B5%D0%BD%D0%BD%D0%B0%D1%8F&charset=utf-8
    • http://media.nn.ru/data/ufiles/2015-11/73/5b/d1/563c6f15cf033_listvkosuiulineikushablondlia1kl.pdf
    • http://media.nn.ru/data/ufiles/2015-11/d9/9e/7c/563c7bc80759c_golosovoiperevodchikonlaingoogle.pdf
    • http://media.nn.ru/data/ufiles/2015-11/94/4c/b4/563c4cf1c1812_kartotekibesedvovtoroimladsheigruppe.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0004851c.bin
52c3b1257e0fb2490b234ef1f18f2877b14217e5e39320958b2d3af9975da076		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4851C 8420 bytes
font_01_sfnt_off00049d17.bin
ef61fc2cae794f0fd803d1349a909d6409b6c8412feeda80d9eefdb13fd25d58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49D17 16364 bytes

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