Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b4cbe6cee3b14c5…

MALICIOUS

PDF

354.3 KB Created: 2015-08-21 09:25:12 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 37ec25f954f63d0808642c81abe4357d SHA-1: 965d0ac5981929e071faa8a14bb9d846aa0c5313 SHA-256: 8b4cbe6cee3b14c5db73ccde26c2900ea34aa7fbd6013ed02a1a07fb70dc3c7b
90 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The document body is heavily obfuscated and unreadable, preventing further analysis of its specific lure. The primary malicious activity observed is the redirection to the external URL.

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=%D1%8D%D0%BB%D0%BB%D0%B0%D0%B8+%D0%BF%D0%B8%D1%81%D1%8C%D0%BC%D0%BE+%D1%82%D0%B5%D0%BA%D1%81%D1%82+%D0%BF%D0%B5%D1%81%D0%BD%D0%B8&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654817_gadanie_onlayn_kogda_ya_vstrechu_svoyu_lyubov.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654804_skachat_chit_na_vormiks_na_otmenu_boya_matrica.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00054521.bin
bb9259c3637ab3ba5946b38bdc338cc1010e579db06fc99b53cd26e9b11a083f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54521 7744 bytes
font_01_sfnt_off00055b5e.bin
862ea6afbaf208bf78657efd2d40e6c61af2de17c291e950f2117375464e3d78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55B5E 15000 bytes

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