Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9ba4f568ccd7275…

MALICIOUS

PDF

342.1 KB Created: 2015-08-28 17:29:34 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: a4885c8c815152edfb0dc5c89123a660 SHA-1: 42609e96e9f83e6b919ccaf4dae6927aea439bcd SHA-256: a9ba4f568ccd7275af30d9eea84215ee0b3679f1e46c20aa2513decd0738954b
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 infrastructure. The embedded URL, http://botcraftman.ru/, is likely used to direct users to a malicious website for phishing or malware delivery. No scripts were extracted from this sample, limiting further analysis of its specific behavior.

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=drp13-r370-full+%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://img1.liveinternet.ru/images/attach/c/7//4809/4809109_doodle__devil__na_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4809/4809128_skachat__besplatno__posobie_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4809/4809165_practice__exam__papers_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00050c9e.bin
185c27d968f108ef9539c168f67f10b310f08447f3f5e07c18b82c2253c4bfee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50C9E 8804 bytes
font_01_sfnt_off000524ab.bin
4cf4113b26549a3fb4c0d6eed69e0d579a4195363c375443ab4008b0c532a2d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x524AB 17288 bytes

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