Malicious PDF — malware analysis report

Static analysis result for SHA-256 36d9ea35b7794600…

MALICIOUS

PDF

387.9 KB Created: 2015-08-27 15:38:15 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 356ac66e73988f0753812e1c5b0dbe55 SHA-1: 91367095b4820d92ec50dd12bef6661189f8d146 SHA-256: 36d9ea35b77946006efc9fb9f8e458d080e4ba416f20dcd4854f798b414fdae0
90 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, http://botcraftman.ru/, which is indicative of a phishing or malware distribution attempt. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, and the document body was heavily obfuscated, preventing a deeper analysis of the lure's content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

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=windows+7+ultimate+x32+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82+%D0%BE%D1%80%D0%B8%D0%B3%D0%B8%D0%BD%D0%B0%D0%BB%D1%8C%D0%BD%D1%8B%D0%B9+%D0%BE%D0%B1%D1%80%D0%B0%D0%B7+2014&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4773/4773411_dolzhnostnaya__instrukciya__voditelyayekspeditora_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4775/4775763_prikaz__ob__uvolnenii_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4772/4772215_adobe__kuler__skachat_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005c049.bin
7e8eb33ced2fad8e927713842ad41c2bf99fee6282ded5fadef145a5bbb9305e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C049 11144 bytes
font_01_sfnt_off0005df2d.bin
909359164c6d2fd86a6325d45d4cf3afc7b44a4e4c0fc814b02e85ef0d79437e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DF2D 15920 bytes

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