Malicious PDF — malware analysis report

Static analysis result for SHA-256 0845481a814ddd3c…

MALICIOUS

PDF

361.4 KB Created: 2015-08-26 10:28:10 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 44a0415743766a1cbc69c5161eb6dc9a SHA-1: e27f282342164dce4979cddc9617281c23c26e6e SHA-256: 0845481a814ddd3cee6f1be979b5a965bcb091300cd0ba09931e89e72d702e8d
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, indicating an attempt to lure the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is a high-confidence indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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%80%D0%B5%D0%B3%D0%B8%D1%81%D1%82%D1%80%D0%B0%D1%86%D0%B8%D0%BE%D0%BD%D0%BD%D1%8B%D0%B9+%D0%BA%D0%BB%D1%8E%D1%87+speedupmycomputer+9&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751566_skachat__prilozhenie__vkontakte_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4752/4752578_chit__kod__na_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751485_butuyrka__skachat__besplatno_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00055b8d.bin
9809559b087ff0180da836ebb58b20dabc5b049eacf0951bff33368e546c03de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55B8D 10296 bytes
font_01_sfnt_off0005777f.bin
a8d62de5bfc17653b4ef5060f5212021f8c0c17db60118f5ea06a94a632c4326		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5777F 15588 bytes

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