Malicious PDF — malware analysis report

Static analysis result for SHA-256 e62da1b1c38eead8…

MALICIOUS

PDF

350.6 KB Created: 2015-08-28 11:43:15 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: bcf0cdf9be2c8e851219a0f94b63cf76 SHA-1: f5d7a8f19db88f37d50165a5e63664887a260e33 SHA-256: e62da1b1c38eead8a46ef263b2552d5b17ea5986e7b7e26e9f991fbe5bb79ba2
90 Risk Score

Malware Insights

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

The PDF file was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL, http://botcraftman.ru/, is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site. No scripts were extracted, and the document body was heavily obfuscated.

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%84%D0%BE%D1%80%D0%BC%D0%B0+%D1%8021001+%D0%B1%D0%BB%D0%B0%D0%BD%D0%BA+2014+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802560_skachat_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802432_texet__tn505_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802513_skachat__sims__3_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000534f7.bin
dd745e88ab0c3d1f635614d367fe8ce295b7296f54c307658cbcdaa3b8d7c9ec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x534F7 8016 bytes
font_01_sfnt_off00054c47.bin
52767c703cf980e3a4eb76c727af5fe4a2e917974d7f86b6b694b6edd827480f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54C47 14924 bytes

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