Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c2f91a591dbedd6…

MALICIOUS

PDF

352.5 KB Created: 2015-08-21 09:20:57 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 0edb997d91f0bbc33fa9a9258ca54226 SHA-1: a03231cfdf2014ab9d2d06b2728d7f00f07311bb SHA-256: 4c2f91a591dbedd6631a35c8d4ffd99fd255f0a1ea017255ba9ae1293bc84fe3
92 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, specifically due to an embedded link pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be luring the user to click the malicious URL, which is likely part of a phishing or malware distribution chain. No scripts were extracted from this sample.

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%A1%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%87%D0%B8%D1%82+%D0%BD%D0%B0+%D0%B2%D0%BE%D1%80%D0%BC%D0%B8%D0%BA%D1%81+%D0%BD%D0%B0+%D0%BE%D1%82%D0%BC%D0%B5%D0%BD%D1%83+%D0%B1%D0%BE%D1%8F+%D0%BC%D0%B0%D1%82%D1%80%D0%B8%D1%86%D0%B0&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654779_skachat_sborku_gta_san_andreas_s_modami.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654680_perevod_teksta_s_angliyskogo_na_russkiy_6_klass_spotlight.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654758_licenzionnuyy_klyuch_dlya_doktor_veb.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00053aa7.bin
34aa8c7243b7a62350d9067fcf1b8c3876e9f4c7116214d3424b3c5a19d94b3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53AA7 7540 bytes
font_01_sfnt_off000550ac.bin
ff4c67180ea01353857245a4da332f8e067ea90f89d13a5ae4f92691c2b437cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x550AC 16172 bytes

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