Malicious PDF — malware analysis report

Static analysis result for SHA-256 563438a04af4965b…

MALICIOUS

PDF

369.2 KB Created: 2015-11-12 23:26:42 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6) First seen: 2020-09-04
MD5: eaacb5b2fe703b0fe0d7ed19e6203eda SHA-1: 70a74d94caf1b3b5f45d293d132b464fa94e70ae SHA-256: 563438a04af4965b9c99b880721763dc9d11645e8f78d2e6a83e494ebce9a823
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The ML classifier strongly flagged this PDF as malicious. An external URI heuristic also identified a suspicious URL, http://taurus-tg.ru/, which is likely intended to host a malicious payload or phishing content. The document body was heavily obfuscated and did not provide further clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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%A0%D0%B0%D1%81%D1%81%D0%BA%D0%B0%D0%B7%D1%8B+%D0%BF%D1%80%D0%B8%D0%BD%D1%83%D0%B4%D0%B8%D1%82%D0%B5%D0%BB%D1%8C%D0%BD%D0%B0%D1%8F+%D1%84%D0%B5%D0%BC%D0%B8%D0%BD%D0%B8%D0%B7%D0%B0%D1%86%D0%B8%D1%8F+%D0%BC%D1%83%D0%B6%D1%87%D0%B8%D0%BD&charset=utf-8 PDF link annotation
    • http://media.nn.ru/data/ufiles/2015-11/00/78/4a/5641ece7abb80_mcpe090skachat.pdfIn PDF document text
    • http://media.nn.ru/data/ufiles/2015-11/dd/a2/5f/564166c760623_aktpriema-peredachisim-kartysotrudnikuobrazets.pdfIn PDF document text
    • http://media.nn.ru/data/ufiles/2015-11/bf/7d/b2/5643af2147e3d_milliarder3audioknigatorrent.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_off00057ef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57EF2 9320 bytes
SHA-256: d9e16f891a21c2f376026615850c73b9a93ba7a7dc4a60a978ab00fc54288b9b
font_01_sfnt_off00059963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59963 14308 bytes
SHA-256: 5704072cee4ae42ded409e6de40fb11d540f578583d17ae51adbeb41ffa13ea8

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