Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcaf0542c9fced9c…

MALICIOUS

PDF

184.4 KB Created: 2015-08-05 15:38:57 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: b0e8d66f00c53f327ae8aeab8943f9ac SHA-1: 135e41c0b2f1ee924f1674cd41c3b1cdaa924557 SHA-256: bcaf0542c9fced9cabf529adeca55584e98d7b27e8375dc0155db95efad4c1c8
90 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating a link to known malicious redirector infrastructure. The ML classifier also flagged the PDF with high confidence. The embedded URL http://botcraftman.ru/?lip&keyword=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%BF%D0%B5%D1%81%D0%BD%D0%B8+%D1%8F%D1%80%D0%BC%D0%B0%D0%BA%D0%B0+mp3&charset=utf-8 is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site.

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=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%BF%D0%B5%D1%81%D0%BD%D0%B8+%D1%8F%D1%80%D0%BC%D0%B0%D0%BA%D0%B0+mp3&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/6//4305/4305266_unesennuye_prizrakami_2_spyaschiy_drakon_skachat_torrent.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4305/4305109_istoriya_ukrainuy_5_klass_vlasov_skachat_besplatno.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304935_manyunya_pishet_fantastichuyskuyy_roman_skachat_besplatno.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023e92.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23E92 3556 bytes
font_01_sfnt_off00024c15.bin
fa565ce56dff902f6b96a77450f59122f9846c3b0a0431903547ea5cef8cfa00		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24C15 14404 bytes
font_02_sfnt_off00027950.bin
43f4438224e41472d4a4a6ffbcd2911269e20d1ddf3c46d0f6ae02bba1af2d20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27950 14632 bytes
font_03_sfnt_off0002a470.bin
14afbba23ebe0572615f9b9ce07d42ebbe610b258619c461cb1391faeb7ceef7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A470 6716 bytes
font_04_sfnt_off0002b7ac.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B7AC 6084 bytes
font_05_sfnt_off0002c741.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C741 3752 bytes

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