Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e81563034b5f473…

MALICIOUS

PDF

346.1 KB Created: 2015-08-21 09:17:37 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 11471699f8c498d5551c5ad3bfcf6959 SHA-1: 644dbd3bc39c09494309cb375053dd22aac5c13a SHA-256: 8e81563034b5f47364edf549b378d8553949e5bf49d05c4f632018361636c623
90 Risk Score

Malware Insights

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

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 flagged this PDF with high confidence. No scripts were extracted, but the presence of a malicious URL is sufficient to classify the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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%BC%D0%BE%D0%B4+%D1%82%D1%80%D0%BE%D0%BF%D0%B8%D0%BA+%D0%BA%D1%80%D0%B0%D1%84%D1%82+%D0%BD%D0%B0+%D0%BC%D0%B0%D0%B9%D0%BD%D0%BA%D1%80%D0%B0%D1%84%D1%82+152&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654684_kogda_budut_izvestnuy_rezultatuy_egye_po_himii_2015.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654697_ts4exe_skachat_dlya_sims_4.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654707_fohisha_kizlar.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000521d0.bin
28878672768e17347f95c40b04a9ab62d41e0f8b7ff88e5b1254ea4b8cba030a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x521D0 10100 bytes
font_01_sfnt_off00053d36.bin
92434ca0338fe6f4f542c4578f24a63c57966e2a37f51795e5a96814e81bf306		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53D36 14096 bytes

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