Malicious PDF — malware analysis report

Static analysis result for SHA-256 7728f817a50cf739…

MALICIOUS

PDF

374.8 KB Created: 2015-11-07 01:02:58 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 1b93aead8defef497d7e6a3ec9074d81 SHA-1: 63ee1434664137c3b675d317c08b658b741ed5e6 SHA-256: 7728f817a50cf739767ecfec13e44606021a11fb62769a2dcffc3e9d8eb853d0
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains an embedded URI and a heuristic firing indicating a redirector link, likely intended for phishing or malware distribution. The URL 'http://taurus-tg.ru/?nnr&keyword=men+ham+namoz+o+qiyman+kitobi+%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' is flagged as a lure for free downloads. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into navigating to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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=men+ham+namoz+o+qiyman+kitobi+%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/2015-11/16/e0/b0/563c3c5ef3c2d_igratonlainvzimnievoinyavatariia.pdfIn PDF document text
    • http://media.nn.ru/data/ufiles/2015-11/7f/a3/ef/563c8a9bac019_konspektyutrenneigimnastikivstarsheigruppe.pdfIn PDF document text
    • http://media.nn.ru/data/ufiles/2015-11/17/df/09/563c5393412b7_portfoliomoiasemiaobrazets.pdfIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00059501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59501 10044 bytes
SHA-256: 7eea636df234d121ede73cb62990b78f7b520cf3b005765fad3af8539a22f428
font_01_sfnt_off0005b155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B155 13352 bytes
SHA-256: 0c2a150d9017fdfad660ad5b20cdd14bb01ec2d50ac8a159404e2893226b8537

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