Malicious PDF — malware analysis report

Static analysis result for SHA-256 19330997b9401d2b…

MALICIOUS

PDF

383.0 KB Created: 2015-08-26 10:22:09 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 9d0ae9c687fd5e9124b9143aea251432 SHA-1: 997c34a3a3dc2c4704a708e6fbcd514558d7e61a SHA-256: 19330997b9401d2b73c1fc89e7cf6c198de26f9d3e694b973ec87f5d20bd10df
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file identified as malicious by a machine learning classifier and heuristic analysis. It contains an embedded JavaScript stream and a critical heuristic firing for a malicious redirector link pointing to 'http://botcraftman.ru/'. This suggests the PDF is designed to lure users to a potentially harmful website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 3

  • 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 JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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%BA%D0%BE%D0%BB%D0%B5%D1%81%D0%BD%D0%B8%D0%BA%D0%BE%D0%B2%D0%B0+%D0%B5%D0%B2+%D1%82%D0%B5%D1%81%D1%82%D1%8B+%D0%B4%D0%BB%D1%8F+%D0%B4%D0%B5%D1%82%D0%B5%D0%B9+5-6+%D0%BB%D0%B5%D1%82&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751442_raspisanie__yelektrichek_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751582_kogda__budut__izvestnuy_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751981_kryak__dlya__fifa_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005b4c8.bin
7a1fcf216f746a78f3d35a2ef258ce8d028eaf5075632c8c39bc5758261e204a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B4C8 8772 bytes
font_01_sfnt_off0005ce3a.bin
49398b39b236b4d15820492970f40de98ff64a376ccb1131f8c4b7a5137f15c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CE3A 14480 bytes

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