Malicious PDF — malware analysis report

Static analysis result for SHA-256 a848784c9891304a…

MALICIOUS

PDF

352.5 KB Created: 2015-08-26 11:26:35 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 342f15d0a0b688c42b1dfded80c1a31c SHA-1: 96f2656f620f8f5dd802571d116a7241e855ef23 SHA-256: a848784c9891304a5e7e3c9d45dca79f7b770cc6166c6647c91dfc9099962c09
90 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a malicious redirector link. The ML classifier also strongly flagged this PDF as malicious. The embedded URL points to botcraftman.ru, which is associated with malicious redirector infrastructure. The document body is heavily obfuscated and unreadable, but the presence of the malicious URL is sufficient to determine the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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=microsoft+visual+studio+2010+professional+rus+%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//4751/4751814_okruzhayuschiy__mir__2_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4753/4753606_skachat__gta__4_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4752/4752169_skachat__programmuy__dlya_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00053884.bin
dd14650715f61bbf562bc6a0b4a1e1ce19fd338498e6399faae456d5306eb810		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53884 9184 bytes
font_01_sfnt_off00055128.bin
cee4adf18838019826d72ff845c007e4262b83a25533b8ebd924375f7054bf8a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55128 16212 bytes

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