Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a128c74ec133ba5…

MALICIOUS

PDF

372.6 KB Created: 2015-08-26 09:54:05 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 9c72483cbe5e30f1a4a14b184ebbf31a SHA-1: 08bd4c20d1bddffff8102628a8c64cecc61f2824 SHA-256: 5a128c74ec133ba57d121748d4c2891e784f395233ecd67d1c252bdeaaf85af5
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 infrastructure, 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, and the document body was heavily obfuscated and truncated, preventing further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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%BA%D0%BB%D0%B8%D0%BF%D1%8B+320+240&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751896_amerikanskaya__istoriya__uzhasov_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751609_skachat__pourochnoe__planirovanie_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751798_skachat__diretix_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005921f.bin
a95e61d6734deb487f8760027a3f8545caf18ba21acb57f707a00c5ec354cdbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5921F 7696 bytes
font_01_sfnt_off0005a878.bin
4d3225f9324b17c916896a6ca588716c45ab1f8fbdf620dfead39d1ead902134		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A878 13484 bytes

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