Malicious PDF — malware analysis report

Static analysis result for SHA-256 293b93ab29b60eef…

MALICIOUS

PDF

343.0 KB Created: 2015-08-28 11:43:50 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 3220ddb92ee6b87caa5b2bf33cdbd945 SHA-1: 27640119f07a2122928b50003aff5a28482f0f75 SHA-256: 293b93ab29b60eef6b3763436815a4c538d8564fe09d797d6e0f35a4121f273d
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'http://botcraftman.ru/'. The document body, though heavily obfuscated, contains text related to 'ts3 install helper monkey', suggesting a lure for a software download. The ML classifier also flagged this PDF with high confidence. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 3

  • 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.
  • ClamAV: Pdf.Dropper.Agent-9146672-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9146672-0
  • 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%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+ts3+install+helper+monkey&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802462_kniga__malahovoy__bud_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802456_skinuy__po__nikam_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802426_programma__dlya__nablyudeniya_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000512c8.bin
84ca6f86ae5f9a1e6260f318ca86df777f7d917a9f0e7613e38f0f99d060beb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x512C8 9416 bytes
font_01_sfnt_off00052ca4.bin
33fba7c7f57ba8a4f20959ca70c2d22646e4e3b811b3b955ff1661d5f00f13a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52CA4 15920 bytes

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