Malicious PDF — malware analysis report

Static analysis result for SHA-256 de15720d4d94ac7b…

MALICIOUS

PDF

354.0 KB Created: 2015-11-16 04:44:14 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6) First seen: 2021-09-29
MD5: 3e4e715f1bc411476ed9857c44b25b6c SHA-1: c60347d62a9ad1ff7e641a908a8f329e8667ba78 SHA-256: de15720d4d94ac7baf513164b98d1d8158f398e8bee643a01d0dc85842c47492
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an external URI and an SEO redirector link pointing to 'taurus-tg.ru', which is indicative of a phishing or scam lure for free downloads. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into visiting a malicious site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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=roofmaker+archicad+16+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE&charset=utf-8 PDF link annotation
    • http://media.nn.ru/data/ufiles/2015-11/98/8a/7b/5648c50fe9059_arkhivatorbinfailovskachat.pdfIn PDF document text
    • http://media.nn.ru/data/ufiles/2015-11/ef/ce/1e/5649171620970_3deffektysmaksimalnymvyletomizekranaskachattorrent.pdfIn PDF document text
    • http://media.nn.ru/data/ufiles/2015-11/52/e6/26/564884ab5d183_geroimechaimagii4vseaddonyskachattorrent.pdfIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00053bd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53BD3 9604 bytes
SHA-256: 1f4b8612449e046c549ccae27339b4a5651aecff1e0e2bb1e9c07ef6164e1617
font_01_sfnt_off00055716.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x55716 16032 bytes
SHA-256: 1692fd11276c9f2f0629f3923aa5ab94a9788a658d5ac3de7f9274978c78d2b3

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