Malicious PDF — malware analysis report

Static analysis result for SHA-256 423233b98293d719…

MALICIOUS

PDF

368.9 KB Created: 2015-08-20 08:59:59 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: e5a36dc8a22d1da8c883b8ee68b28662 SHA-1: 998a7db33dde1bb097a704ab1890e8a010d25925 SHA-256: 423233b98293d719ea041bf8063384d51c5cb2f942311df5c36b59cb095f7c08
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, http://botcraftman.ru/, which is a strong indicator of malicious intent. The ML classifier also flagged this PDF with high confidence. The document body is heavily obfuscated and does not provide clear textual lures, but the presence of the malicious URL suggests a phishing or malware distribution attempt. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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=wifi+analyzer+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B4%D0%BB%D1%8F+windows+7&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/6//4639/4639996_disk_vo_imya_zhizni_hadzhi_bazuylhan_yusupov_skachat_besplatno.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4639/4639531_skachat_besplatno_rukovodstvo_po_remontu_audi_a6_s5.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4640/4640316_otvetuy_po_gia_2015_po_matematike_9_klass.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00057ac8.bin
283c865f1aa3f82423fb3c5f690f3dea5813029fca49ca60b13227f5f2ec1a5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57AC8 9528 bytes
font_01_sfnt_off00059528.bin
f6b46ab272689a01a8e0d685c8faa70a10801ca3f9c180fa04b3165fb1a4b125		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59528 15284 bytes

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