Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e1e13cc4f4bfaaf…

MALICIOUS

PDF

351.0 KB Created: 2015-11-08 10:23:33 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: bce036504fc46622969465346cd6e729 SHA-1: b8f789c839a47eb24b910f551baf97d66e1c2c9b SHA-256: 3e1e13cc4f4bfaaf1fcdfeee11a8a084e400206829907d7009970813c843b153
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The ML classifier flagged this PDF with high confidence as malicious. An external URI was detected pointing to 'http://taurus-tg.ru/'. The document body is heavily obfuscated and truncated, preventing a detailed analysis of its specific content or intent. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 3

  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=%D0%A7%D0%B8%D1%82%D0%B0%D1%82%D1%8C+%D0%BF%D1%80%D0%B8%D0%BA%D0%B0%D0%B7+%D0%BC%D0%B2%D0%B4+%D1%80%D0%BE%D1%81%D1%81%D0%B8%D0%B8+200+%D0%B4%D1%81%D0%BF+%D0%BE%D1%82+12042013-2&charset=utf-8 PDF link annotation
    • http://media.nn.ru/data/ufiles/2015-11/61/29/3e/563e552842733_kaksdelatbessmertievstalkerenarodnaiasolianka.pdfIn PDF document text
    • http://media.nn.ru/data/ufiles/2015-11/33/5d/78/563e623a6d011_programmapoiskatelefonapoimei.pdfIn PDF document text
    • http://media.nn.ru/data/ufiles/2015-11/74/f5/25/563eb69db0b51_bonuskodywotnaiiul2015deistvuiushchii92.pdfIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00053759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53759 8268 bytes
SHA-256: a85e2b60217908de76376187c4965d9d3a3ceebcf6a568cbc46c63f3f38a2861
font_01_sfnt_off00054f81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x54F81 14172 bytes
SHA-256: 8977fb4d8bac029a6103f2642ae282334065dbb66b2a5afef09bfb7d106a6b14

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