Malicious PDF — malware analysis report

Static analysis result for SHA-256 4854418199dded1b…

MALICIOUS

PDF

360.4 KB Created: 2015-08-28 00:13:21 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: f7de24bb80d7495d050831705ab00501 SHA-1: 5cd5cd1f86f81ac7a255b803f4006236a8f41617 SHA-256: 4854418199dded1bfc7ec984b209d46dabb64aab3407ed70515e337b7ae91f65
90 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains a link to a known malicious redirector at botcraftman.ru. This suggests the document is designed to lure users to a malicious website. No scripts were extracted from this sample, and the document body was heavily obfuscated.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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%B3%D0%B8%D0%B1%D0%BB%D1%8B%D0%B5+%D0%B7%D0%B5%D0%BC%D0%BB%D0%B8+%D0%B8%D1%81%D1%82%D0%BE%D0%BA%D0%B8+%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
    • http://img0.liveinternet.ru/images/attach/c/7//4788/4788274_pesni__mertvuyh__solovev_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4788/4788434_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4788/4788079_shablonuy__krasivo__oformlennuyh_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00055e72.bin
5444bc24e9ce005375e018faa2faec35b0e4748d5c6f8f46bdac7c5ea70e0db3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55E72 8140 bytes
font_01_sfnt_off0005760a.bin
7758e81346df106004c5b9c57a370a5f187d434f5f753781b6045f11aae4231e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5760A 14140 bytes

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