Malicious PDF — malware analysis report

Static analysis result for SHA-256 4490ea8590e60867…

MALICIOUS

PDF

363.2 KB Created: 2015-08-26 11:12:31 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 6939f8dd3ad23522ea2a9979780e3880 SHA-1: 86eafa9f2ca6015ae6900b90867ce975ddfb3f53 SHA-256: 4490ea8590e608672d94535e5f9683749800f261c174a62fbdfcbc4230de69eb
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URL that points to a known malicious redirector. This heuristic, combined with the ML classifier's high confidence, indicates the document is designed to lure users to a malicious site. No scripts were extracted, but the presence of a malicious redirector is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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+%D1%81%D0%B8%D0%BC%D1%81+%D1%84%D1%80%D0%B8%D0%BF%D0%BB%D0%B5%D0%B9+%D0%BD%D0%B0+%D0%BA%D0%BE%D0%BC%D0%BF%D1%8C%D1%8E%D1%82%D0%B5%D1%80&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4752/4752923_servera__maynkraft__152_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4752/4752246_skachat__assasin__krid_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4753/4753568_igruy__kvestuy__na_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00056623.bin
25aa46a25f324a155d2e91792bbda12d23125c8ab23d1aaf2e788e6f221d7864		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56623 9420 bytes
font_01_sfnt_off00058064.bin
6b7e20faa10a8f7b0887c37deee31446cc29fa01ba2cf724188aa5e7c1d07580		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58064 14456 bytes

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