Malicious PDF — malware analysis report

Static analysis result for SHA-256 8766cce0d451a2bd…

MALICIOUS

PDF

188.8 KB Created: 2015-07-27 13:54:47 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 24643944fbca0395eab820676d729ea3 SHA-1: 8985e74acb422d5f28503273e3e940ea2dcf5d76 SHA-256: 8766cce0d451a2bdab2d52d6c649db285c40140876a3879189e0aee29f5ffd3c
92 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, http://botcraftman.ru/, which is highly indicative of malicious intent. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of the malicious URL is sufficient to determine the attack pattern. The file was generated by wkhtmltopdf, suggesting it may have been created programmatically to deliver the malicious link.

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%B0%D0%B2%D1%82%D0%BE%D0%BA%D0%B0%D0%B4+2014+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE+%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%B0%D1%8F+%D0%B2%D0%B5%D1%80%D1%81%D0%B8%D1%8F+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82+64+bit&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4224/4224542_skachat_maynkraft_152_piratka_bez_virusov.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4217/4217792_primeruy_portfolio_studenta_prezentaciya.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4217/4217990_svadebnuyy_vuykup_nevestuy_scenariy_prikolnuyy.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024c2d.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24C2D 3556 bytes
font_01_sfnt_off000259b0.bin
987ad80f1645e78d569b0b8eda02f6bd84038b5d3f875f5f5eff559e6384b902		 pdf-font-stream PDF embedded font (sfnt) at offset 0x259B0 14704 bytes
font_02_sfnt_off0002879c.bin
1493d6fc71cc97ae82a84af4fc4cda9f6fbd288c1fed6c54a67441e27e033cae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2879C 14712 bytes
font_03_sfnt_off0002b312.bin
985c1b967396129e0b96ac8a0ae76b1c5b6d1d9ac22843faaaa84ece0b3c8c2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B312 7552 bytes
font_04_sfnt_off0002c966.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C966 6084 bytes
font_05_sfnt_off0002d8fb.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D8FB 3752 bytes

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