Malicious PDF — malware analysis report

Static analysis result for SHA-256 a51993f4ed028dfb…

MALICIOUS

PDF

385.5 KB Created: 2015-11-08 14:16:01 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6) First seen: 2020-07-02
MD5: 943ac2016585a7712e55142fd4a797c7 SHA-1: 973dedc41491217e3da8d73b2557c7caab77c7a5 SHA-256: a51993f4ed028dfb69dd30d41b53e24fdb075e4fafc78b123d0b13886fa769a0
74 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

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%B6%D0%B8%D0%B2%D1%8B%D0%B5+%D0%BE%D0%B1%D0%BE%D0%B8+%D0%B0%D0%BD%D0%B4%D1%80%D0%BE%D0%B8%D0%B4+%D1%81%D0%B8%D1%81%D1%8C%D0%BA%D0%B8&charset=utf-8 PDF link annotation
    • http://media.nn.ru/data/ufiles/2015-11/88/f1/11/563dfb6a1e7a5_skachatmodnastalkertenchernobyliatorgovtsyprodaiutvse.pdfIn PDF document text
    • http://media.nn.ru/data/ufiles/2015-11/f3/23/fb/563dc8766bdf6_skachatbesplatnosims4nakompiuterrusskaiaversiia.pdfIn PDF document text
    • http://media.nn.ru/data/ufiles/2015-11/5a/97/3f/563dc6f3e0099_prioradliagtasanandreas.pdfIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005c03b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C03B 9256 bytes
SHA-256: d5f8704c6770d8103d1e69c19af9f349e184ee00055d346814c85b06ec1edaa3
font_01_sfnt_off0005d96b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D96B 14552 bytes
SHA-256: 33b3c9d83ae40478ac9e880b5070b21acd8396f370a57f69419f78abe0302317

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