Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a29dc3f9260b9c8…

MALICIOUS

PDF

351.1 KB Created: 2015-08-28 11:51:01 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: e2e1f42abc4bb0ff67b530c62a345482 SHA-1: 17f92d85c030c203c3a87e7379b2ab2a6bb38d1b SHA-256: 9a29dc3f9260b9c8840b7111ece3fd83e97d8923ba48d4cd5b34b871d075a173
92 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, http://botcraftman.ru/, which is presented as a download for a 'call recorder'. This indicates a social engineering lure to direct the user to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+call+recorder&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802711_obrazec__zapolneniya__anketuy_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802467_skachat__sbiv__animki_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802424_skachat__klient__minecraft_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00053b44.bin
7326ce55c07e78b36c6dc237cb4250d6a32340ddfc397fa961855265c68b5dee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53B44 8604 bytes
font_01_sfnt_off000552d8.bin
edb182f77a672363bfc6aa7b7b03828c7d66e3f5574decb66c4ea01b0b14683f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x552D8 13720 bytes

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