Malicious PDF — malware analysis report

Static analysis result for SHA-256 0425d546a856aceb…

MALICIOUS

PDF

358.6 KB Created: 2015-08-11 02:26:49 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6) First seen: 2018-02-19
MD5: 3f66d902e66bf76d1654e894f878feee SHA-1: 1d2956eb8fe57eb46aff06d6b70bb4831b49d91e SHA-256: 0425d546a856aceb10224e695e2915d34622bf8d4e37fa4bcd1fb20ba5ea67cc
74 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains an external URI that functions as an SEO redirector, likely leading to a phishing or malware distribution site. The heuristic 'PDF_SEO_UTM_REDIRECTOR_LINK' specifically identifies this as an image lure for free-download phishing. No scripts were extracted, but the presence of a redirector URL suggests an attempt to lure the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6855

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://ruqvarq.ru/?a1Kf&keyword=%D0%B4%D0%B5%D0%BA%D0%BB%D0%B0%D1%80%D0%B0%D1%86%D0%B8%D1%8F+%D0%BF%D0%BE+%D0%BD%D0%B0%D0%BB%D0%BE%D0%B3%D1%83+%D0%BD%D0%B0+%D0%B8%D0%BC%D1%83%D1%89%D0%B5%D1%81%D1%82%D0%B2%D0%BE+%D0%BF%D1%80%D0%B8%D0%BC%D0%B5%D1%80+%D0%B7%D0%B0%D0%BF%D0%BE%D0%BB%D0%BD%D0%B5%D0%BD%D0%B8%D1%8F&charset=utf-8 PDF link annotation
    • http://ruqvarq.ru/?a1Kf&keyword=%D0%B4%D0%B5%D0%BA%D0%BB%D0%B0%D1%80%D0%B0%D1%86%D0%B8%D1%8F+%D0%BF%D0%BE+%D0%BD%D0%B0%D0%BB%D0%BE%D0%B3%D1%83+%D0%BD%D0%B0+%D0%B8%D0%BC%D1%83%D1%89%D0%B5%D1%81%D1%82%D0%B2%D0%BE+%D0%BF%D1%80%D0%B8%D0%BC%D0%B5%D1%80+%D0%B7%D0%B0%D0%BF%D0%BE%D0%BB%D0%BD%D0%B5%D0%BD%D0%PDF link annotation
    • http://img1.liveinternet.ru/images/attach/c/6//4479/4479726_shema_metro_moskava.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/6//4480/4480604_plan_shema_vuypolneniya_proektirovaniya.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/6//4478/4478102_shema_vuyshivki_sem_not_krasotuy.pdfIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000557ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x557FF 8096 bytes
SHA-256: 43e3ffa3e1ccf5bb39328447f73db96594d15c52ac9193fa99284478757bf5ff
font_01_sfnt_off00057085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57085 13272 bytes
SHA-256: b09fa69106c9d97d085e63dac96c27f5ea9fd19ae7556a7b5620b7bd7f984f16

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