Malicious PDF — malware analysis report

Static analysis result for SHA-256 c652532e0dcc4b45…

MALICIOUS

PDF

343.5 KB Created: 2015-08-21 09:33:49 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: af98ded3c40e8e9145bdf3b25b211920 SHA-1: 639044321c6fec51d92f31f63d2d800dc2d513af SHA-256: c652532e0dcc4b453439a345cafbb8dbb4d3ddd70a0abd1fec07a7b17b0191ef
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file 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+%D0%B8%D0%B3%D1%80%D1%83+blockscape+%D1%87%D0%B5%D1%80%D0%B5%D0%B7+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8', is designed to lure users into downloading potentially malicious content by promising a game download. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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%B8%D0%B3%D1%80%D1%83+blockscape+%D1%87%D0%B5%D1%80%D0%B5%D0%B7+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654812_programma_dlya_skachivaniya_muzuyki_vkontakte_dlya_vindovs_8.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654977_kak_sdelat_svertuysh_dlya_zamkov_chertzh.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654695_kamedi_vumen_2015_skachat_besplatno.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00051795.bin
538a0867e8603c51aa564a9a2a953fa510f3633151b913d5fa90f3d3194fda6c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51795 9240 bytes
font_01_sfnt_off0005307d.bin
50b8d4cb60c38de6946e286102971bd1ef94e5fee65f71d650f15bf1617cf799		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5307D 15236 bytes

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