Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bbc4eda87523268…

MALICIOUS

PDF

351.8 KB Created: 2015-08-28 18:28:20 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 5b4172880aa19f70bc118b71640dc331 SHA-1: 3fb6666b3862427e788b01e9ec62479062035c2f SHA-256: 0bbc4eda87523268fa332a0e89689095d96b8f2483915a35dc3315af05be3dda
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, botcraftman.ru, which is likely used to host or redirect to malware. The ML classifier also flagged this PDF with high confidence. The embedded content, though heavily obfuscated, suggests an attempt to trick the user into clicking the malicious link, likely for a phishing or malware download attempt.

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%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE+%D0%BA%D0%B0%D1%80%D1%82%D0%B8%D0%BD%D0%BA%D0%B8+%D0%BC%D0%B0%D0%B9%D0%BD%D0%BA%D1%80%D0%B0%D1%84%D1%82&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4809/4809173_skachat__igruy__na_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4809/4809608_skachat__klyuchi__aktivacii_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4810/4810107_kak__reshat__zadachi_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000536bb.bin
34e18114a1fd22e49efe90b1be55d2c68a6633ba7c544fcb12728a5428184ddd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x536BB 8328 bytes
font_01_sfnt_off00054ea7.bin
207364fc32720c7e47f6f485dcc3f9e43e03913eec65df78d0e3b6bd2d833098		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54EA7 15688 bytes

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