Malicious PDF — malware analysis report

Static analysis result for SHA-256 81bb70d80d9fbdfe…

MALICIOUS

PDF

360.0 KB Created: 2015-08-28 00:27:53 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: d50ee21c58b4f6f1ff4de5f7e94e388e SHA-1: 25b390fc2163bf60372c7c0f457b89c60af92b84 SHA-256: 81bb70d80d9fbdfea4366ae3160fb237d795489bbe5b392070b5a7088b12883e
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains an embedded link to a known malicious redirector at http://botcraftman.ru/. This heuristic firing indicates the document is designed to lure users to a potentially harmful site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 2

  • 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.
  • 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=%D0%BD%D0%B0%D1%80%D1%8F%D0%B4+%D0%B4%D0%BE%D0%BF%D1%83%D1%81%D0%BA+%D0%B4%D0%BB%D1%8F+%D1%80%D0%B0%D0%B1%D0%BE%D1%82%D1%8B+%D0%B2+%D1%8D%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%BE%D1%83%D1%81%D1%82%D0%B0%D0%BD%D0%BE%D0%B2%D0%BA%D0%B0%D1%85+%D0%B1%D0%BB%D0%B0%D0%BD%D0%BA&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4788/4788346_kniga__ucheta__dohodov_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4788/4788599_kak__stat__adminom_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4788/4788903_skachat__java__150_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000556ef.bin
bf327dc56dfb0a2364e2034a47664e37d328d17462aa2742db00a0a968289b99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x556EF 9696 bytes
font_01_sfnt_off000572f1.bin
128d9129b1415b9f75158c9314e414c8353d03e859883d95f5053dc79dd5a7da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x572F1 14612 bytes

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