Malicious PDF — malware analysis report

Static analysis result for SHA-256 49641d706883026f…

MALICIOUS

PDF

354.1 KB Created: 2015-08-20 09:12:39 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: dce98024122ae7dd28bac30ff6c76c33 SHA-1: 710d53cba155bd643c44bc4626cc4e8822924fd3 SHA-256: 49641d706883026f0ecf6c2ce3caa6c277a44e42cb8981450139471054cdb5f2
90 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, specifically for containing a link to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL http://botcraftman.ru/... is the primary indicator of compromise, likely serving as a lure for phishing or to download further malicious content. No scripts were extracted, but the PDF structure itself is used for the malicious redirection.

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=%D0%BB%D0%B8%D1%87%D0%BD%D0%B0%D1%8F+%D0%B6%D0%B8%D0%B7%D0%BD%D1%8C+%D1%81%D0%BB%D0%B5%D0%B4%D0%BE%D0%B2%D0%B0%D1%82%D0%B5%D0%BB%D1%8F+%D1%81%D0%B0%D0%B2%D0%B5%D0%BB%D1%8C%D0%B5%D0%B2%D0%B0+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/6//4639/4639835_radio_rekord_rashen_miks_skachat_2015.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4639/4639753_windows_7_skachat_torrent_64_bit_2015_rus_zver.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4640/4640128_lednikovuyy_period_1_igra_skachat_torrent.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00054076.bin
8d94a4ad5256fc19d552e9aafe07e77f10119d868d86d58c5dc458ec62062a87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54076 8300 bytes
font_01_sfnt_off000558e4.bin
d2109500a533c32967c047211c01f6fa2f16b61d2e4ef6e4607b88578cabe596		 pdf-font-stream PDF embedded font (sfnt) at offset 0x558E4 15264 bytes

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