Malicious PDF — malware analysis report

Static analysis result for SHA-256 85e885744f9347bb…

MALICIOUS

PDF

341.9 KB Created: 2015-08-28 11:37:13 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 4510e21cfd09096165e0b257681982d5 SHA-1: ca80fb1ab5bf8b56cfb3f0b8ab3d5c394267d387 SHA-256: 85e885744f9347bbc4d80197042da50065653fb7d64827b127b440afbbeed4a1
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing indicating a link to known malicious redirector infrastructure. The embedded URL 'http://botcraftman.ru/?lip&keyword=jre170_25-cmsi+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&charset=utf-8' is the primary indicator of malicious intent. Although no scripts were extracted, the presence of a malicious redirector strongly suggests the document is designed to lure the user to a harmful site.

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=jre170_25-cmsi+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802504_chto__takoe__programma_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802395_dogovor__nayma__zhilogo_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802448_winzip__skachat_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00050e48.bin
c4e7e25e3e4b121a12c003a4e887c7aab141e0f3c66732db0fd5211c0fc9f96b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50E48 8992 bytes
font_01_sfnt_off00052779.bin
5b50c57316d5055a277230d384e6274fa6397ba33f1b5f2681c5f2e9fee98500		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52779 15732 bytes

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