Malicious PDF — malware analysis report

Static analysis result for SHA-256 d83bd910a7051b33…

MALICIOUS

PDF

360.8 KB Created: 2015-08-20 09:17:46 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 2a67c6d6220b3eb5dfe8624f928a50b6 SHA-1: 2fb2d48322d908768745dfd751943a028e5db6f6 SHA-256: d83bd910a7051b33c7bb125bcf2cb4ecc2e9701f473a37c6b320b8cfc42d9d90
92 Risk Score

Malware Insights

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

The PDF file was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL, http://botcraftman.ru/..., is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the exact payload.

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%B2+%D1%83%D0%B4%D0%B0%D1%80%D0%B5+3+%D1%81%D0%B5%D0%B7%D0%BE%D0%BD+1+%D1%81%D0%B5%D1%80%D0%B8%D1%8F+%D0%BD%D0%B0+%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%BE%D0%BC&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/6//4639/4639737_testuy_egye_po_istorii_2015_reshat_onlayn_i_otvetuy.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4639/4639725_rabochaya_programma_po_mhk_10_11_klass_danilova.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4640/4640461_telefonnaya_baza_moskvuy_torrent.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000560d1.bin
950683d51e804bc3e4078d4abdbe2d735d3cc43e5c71d071d29db6e5a43d6402		 pdf-font-stream PDF embedded font (sfnt) at offset 0x560D1 7532 bytes
font_01_sfnt_off000576e8.bin
0eee9c43acfb72b9c6672e59363c40cbc589fbdc402f38aa3c0cf251550b3b92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x576E8 13996 bytes

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