Malicious PDF — malware analysis report

Static analysis result for SHA-256 edc5f81a47c9727b…

MALICIOUS

PDF

368.3 KB Created: 2015-08-28 00:46:42 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6) First seen: 2021-08-20
MD5: 122a8648419b6f7a044376de32ead4c4 SHA-1: 50e03ff0d749983309bf2d33dbbb773cf1c21351 SHA-256: edc5f81a47c9727bcf2fc2ad8dddb994e283704675cbc74d683ce276536b32f7
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, botcraftman.ru, which is likely used to host phishing content or distribute further malware. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of a malicious redirector is a strong indicator of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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=220+%D0%B2%D0%BE%D0%BB%D1%8C%D1%82+%D0%BB%D1%8E%D0%B1%D0%B2%D0%B8+2+%D1%81%D0%B5%D0%B7%D0%BE%D0%BD+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8 In PDF document text
    • http://img0.liveinternet.ru/images/attach/c/7//4788/4788071_skachat__indikator__trend_.pdfIn PDF document text
    • http://img1.liveinternet.ru/images/attach/c/7//4787/4787927_kak__razblokirovat__sim_.pdfIn PDF document text
    • http://img1.liveinternet.ru/images/attach/c/7//4789/4789294_matematika__dlya__tehnikumov_.pdfIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00057633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x57633 8468 bytes
SHA-256: 6eb0066db962079f123c8645711c5275484afe188f40cba729d22de70f648e98
font_01_sfnt_off00058eeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58EEB 16328 bytes
SHA-256: 4358ff479fb6166b4667bd8f998e937ce5011b958305bb51d483b318833cd6c7

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