Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb73fb82d900cc12…

MALICIOUS

PDF

349.1 KB Created: 2015-08-28 11:49:54 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: ad672db31fe5c407770c453657844b6b SHA-1: e4b706deb21d06d7eb543f5a4e9ff99c1e14ca26 SHA-256: bb73fb82d900cc12047d4c14514a0dd53ae53791daba3c708d90ce40faf4efd4
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. The embedded document body is heavily obfuscated and unreadable, but the presence of the malicious URL is a strong indicator of malicious intent. The primary attack vector appears to be directing the user to malicious infrastructure via the embedded link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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%82%D1%80%D0%B5%D0%B9%D0%BD%D0%B5%D1%80+%D0%B4%D0%BB%D1%8F+%D1%81%D1%82%D0%B0%D0%BB%D0%BA%D0%B5%D1%80+%D1%82%D0%B5%D0%BD%D1%8C+%D1%87%D0%B5%D1%80%D0%BD%D0%BE%D0%B1%D1%8B%D0%BB%D1%8F+10006&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802456_skinuy__po__nikam_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802698_scenariy__vstrechi__vuypusknikov_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802681_skachat__kartinki__na_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00052e58.bin
47c88a6fb6cb770a46dfc98cc1eb4c716ca2100af33afcdc21adbfeb8078a24d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52E58 8904 bytes
font_01_sfnt_off00054826.bin
f930c5d2365204b16a6ed0fba67740e948ab900fb664d2f715e014fef74bc50a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54826 13940 bytes

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