Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b41cf39af934114…

MALICIOUS

PDF

363.9 KB Created: 2015-08-26 16:50:21 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: dd1e3bdb616c1a65eaff1b2e3ba90529 SHA-1: 7691688476aec89eeebb3b69a4c4da9837f87d1b SHA-256: 9b41cf39af934114b4cfb8517c98162520ee829a55fa2a64fdc02abd52dba271
92 Risk Score

Malware Insights

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

The PDF contains an embedded link to a known malicious redirector URL, botcraftman.ru. This indicates the document is designed to lure users to a malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted from this sample, but the presence of the malicious URL is sufficient evidence for the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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=%D0%BB%D0%B5%D0%BA%D1%86%D0%B8%D0%B8+%D0%BA%D0%BE%D1%81+%D0%BF%D0%BE+%D0%BB%D0%B8%D1%82%D0%B5%D1%80%D0%B0%D1%82%D1%83%D1%80%D0%B5+117+%D1%87%D0%B0%D1%81%D0%BE%D0%B2+%D0%B4%D0%BB%D1%8F+%D1%81%D0%BF%D0%BE&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751567_podgotovka__k__egye_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751887_elite__keylogger__x64_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751799_shablon__rezyume__na_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00056a31.bin
cd03eb162f4f76921127fb5d4d5df884a9220e699c8b67b33d5721fcf7f516e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56A31 8532 bytes
font_01_sfnt_off00058310.bin
c7ca09546e7ac372990eab33b3c03daacecb0bb9e1b4fdb62e2a014c181e5ff6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58310 14624 bytes

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