Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a7681aeb7037333…

MALICIOUS

PDF

350.1 KB Created: 2015-08-24 06:18:23 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: ce4983b6d8cdd625d7c4362752179cef SHA-1: 79047779e3e27e72949841f46cbd545c0c8c88e7 SHA-256: 6a7681aeb7037333691434d58767b482a8fb89b73f9ea62afe779636554863a0
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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. Although no scripts were extracted, the presence of a malicious URL strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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%BF%D0%B0%D0%BD%D0%B5%D0%BB%D1%8C+%D0%BC%D0%B0%D1%82%D0%B5%D0%BC%D0%B0%D1%82%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%BE%D0%B3%D0%BE+%D0%B2%D0%B2%D0%BE%D0%B4%D0%B0+%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//4693/4693387_five__finger__death_.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4694/4694531_bonus__kod__dlya_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4701/4701310_kosuy__po__matematike_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00052f84.bin
b48b739824b6ff40cdfca0165d88c9675f97c7be91f0dd2752fa4d1dd217a29a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52F84 7944 bytes
font_01_sfnt_off000546b5.bin
4b696d111ea14a009a2cc8d66941c22c3a3663061ee9068fd49e098aba268dfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x546B5 16504 bytes

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