Malicious PDF — malware analysis report

Static analysis result for SHA-256 81c07f65843cf86e…

MALICIOUS

PDF

340.1 KB Created: 2015-08-25 15:23:20 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6) First seen: 2026-06-05
MD5: 654abbea6928328a8d91dd4bc61f8c8b SHA-1: e536f048f266ec8774b425eee55df07037bf63e4 SHA-256: 81c07f65843cf86edf85a5028b6a6b44a79a61e1ae7ff21ee8b3935bfcd7b147
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a known malicious domain, botcraftman.ru. This suggests the document is designed to trick users into visiting a site that may host phishing content or distribute malware. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://botcraftman.ru/?lip&keyword=%D1%81%D0%B0%D0%BC%D1%8B%D0%B5+%D0%B3%D1%80%D0%BE%D0%BC%D0%BA%D0%B8%D0%B5+%D1%80%D0%B8%D0%BD%D0%B3%D1%82%D0%BE%D0%BD%D1%8B+%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 In PDF document text
    • http://img1.liveinternet.ru/images/attach/c/7//4731/4731236_shema__vodomernogo__uzla_.pdfIn PDF document text
    • http://img1.liveinternet.ru/images/attach/c/7//4731/4731788_obrazec__spravki__s_.pdfIn PDF document text
    • http://img1.liveinternet.ru/images/attach/c/7//4731/4731071_minecraft__12__skachat_.pdfIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00050a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50A66 8836 bytes
SHA-256: d416a78463e3edc78de67b7d6fcf80797cda92ada9dbe6ccd2d75dfd34c936c9
font_01_sfnt_off000523de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x523DE 14788 bytes
SHA-256: 4ca389074482d4b0501cdaecea65c9b66e554804ab4bc15794af816be9aa3d0a

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