Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d8d9aa8503befff…

MALICIOUS

PDF

350.3 KB Created: 2015-08-28 11:46:45 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 1324420d14ebecd25fa668912a4e5490 SHA-1: 648e9d8f97885e49ae85df713b8c18624fa2450a SHA-256: 4d8d9aa8503befff7015a322ee2b2922a2c5ccc494313f99905168743a35f0db
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 is likely used to direct the user to a site that hosts malware or phishing content. No scripts were extracted from this sample.

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%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B0%D0%BA%D1%82%D0%B8%D0%B2%D0%B0%D1%82%D0%BE%D1%80+%D0%B4%D0%BB%D1%8F+windows+81&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//4802/4802600_testuy__po__istorii_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802574_the__forest__skachat_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00053173.bin
d08f09b1bf331b92699c0bba806cad3b7c16a47e52015dca811fb1856df23a7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53173 8940 bytes
font_01_sfnt_off00054a78.bin
b585281a9a0c1e96106e548efc9ae8fa33a666d6a8b1fba96903c013f8e4d686		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54A78 15340 bytes

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