Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef39361d6aa83720…

MALICIOUS

PDF

184.8 KB Created: 2015-07-25 05:54:18 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 1510dde4b7144f9b7183581702625681 SHA-1: b8e210edf7e9f7a5b1319184eab36cfe8ad01dd1 SHA-256: ef39361d6aa8372029c5fdf443f2004ac6283f805cfe953b9ed4a34c02fa287d
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also assigned a high probability of maliciousness. The embedded URL, http://botcraftman.ru/..., is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site. No scripts were extracted, and the document body was not parsable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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=%D0%A1%D0%B0%D0%BC%D0%B0%D1%8F+%D0%B3%D1%80%D0%BE%D0%BC%D0%BA%D0%B0%D1%8F+%D0%BC%D1%83%D0%B7%D1%8B%D0%BA%D0%B0+%D0%BD%D0%B0+%D1%82%D0%B5%D0%BB%D0%B5%D1%84%D0%BE%D0%BD&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184752_dnevnik_po_uchebnoy_praktike_v_otdele_doznaniya.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4192/4192571_perevodnoy_yekzamen_po_algebre_7_klass_2015_god_s_otvetami.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185681_skachat_film_mr4_cherez_torrent_besplatno_v_horoshem_kachestve.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000240a2.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x240A2 3556 bytes
font_01_sfnt_off00024e25.bin
609edbc15c577778ac613cdc0f42f2cee8028c3290cd13f862110749ca198c5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24E25 14316 bytes
font_02_sfnt_off00027b51.bin
dde8cb3db78f49492d397de1013a074ab9c596bc0508faa33f94bd64189db0ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27B51 14468 bytes
font_03_sfnt_off0002a604.bin
91024d7957ea879b13653cf84e983ec6ba5b7297080e294a25374597b069579f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A604 6720 bytes
font_04_sfnt_off0002b962.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B962 6084 bytes
font_05_sfnt_off0002c8f7.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C8F7 3752 bytes

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