Malicious PDF — malware analysis report

Static analysis result for SHA-256 16d3ce77881276e0…

MALICIOUS

PDF

366.6 KB Created: 2015-08-20 07:17:49 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 17e2ab8ac3992333ba5f7924ab6e27c5 SHA-1: c78e5f5321c76c20914477ae1f2f88568e8b4871 SHA-256: 16d3ce77881276e05b6172915bd052f7fcb26e78ae49508f9fd87a2e4645cbf8
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=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+abbyy+finereader+10+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE+%D1%81+%D0%BA%D0%BB%D1%8E%D1%87%D0%BE%D0%BC+%D0%B4%D0%BB%D1%8F+%D0%B0%D0%BA%D1%82%D0%B8%D0%B2%D0%B0%D1%86%D0%B8%D0%B8&charset=utf-8', suggests a lure for downloading software. Although no scripts were extracted, the ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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+abbyy+finereader+10+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE+%D1%81+%D0%BA%D0%BB%D1%8E%D1%87%D0%BE%D0%BC+%D0%B4%D0%BB%D1%8F+%D0%B0%D0%BA%D1%82%D0%B8%D0%B2%D0%B0%D1%86%D0%B8%D0%B8&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4638/4638809_kekv_u_2015_roc_rozshifrovka_skachat.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4638/4638802_adr_player_skachat.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4638/4638823_kanal_tlc_smotret_onlayn_na_russkom.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005739c.bin
85c825023e9e74166a5fd46571f7c0579b84fb6d0152c6016dc2b3b4d7defa57		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5739C 9600 bytes
font_01_sfnt_off00058e9e.bin
77eec7df5179e8927fec168ad402c782ed2d2a2b3517c1be3703070087fdbbb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58E9E 14448 bytes

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