Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3884288b34ca60d…

MALICIOUS

PDF

186.3 KB Created: 2015-07-24 23:42:24 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 9a4d7db59d20310023135a71043813ba SHA-1: 25a7f07f8e35ca39cf2b6fe52b91139e1649d362 SHA-256: a3884288b34ca60d5e64f5416596e51c4f48fe544d3aa34489f27b915a8a7646
90 Risk Score

Malware Insights

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

The PDF contains an embedded link to a known malicious redirector infrastructure. The ML classifier also flagged this PDF with high confidence. The primary attack vector appears to be luring the user to the malicious URL http://botcraftman.ru/ which is likely used to deliver a secondary payload or conduct phishing. No scripts were extracted from this sample.

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+visio+2007+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE+%D0%BD%D0%B0+%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%BE%D0%BC&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4188/4188883_neat_video_skachat_besplatno_russkaya_versiya.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4192/4192754_zhozefina_mutcenbaher_smotret_onlayn_na_russkom.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184515_skachat_vse_albomuy_atb_cherez_torrent.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002aa34.bin
e758c808b29a7a4a778998af187da7f19806f4fb9c6772a1dc2a87aeb0543642		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2AA34 7220 bytes
font_00_sfnt_off000242d8.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x242D8 3556 bytes
font_01_sfnt_off0002505b.bin
d6af60e1fcf531d671b9b214f703a346664c2529f74c004a4de3e1622a732c2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2505B 15028 bytes
font_02_sfnt_off00027f20.bin
96d3406f08230fd7dea54ade43577e73449b41c957927bb9a79bad08077a66c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27F20 14564 bytes
font_04_sfnt_off0002bf56.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BF56 6084 bytes
font_05_sfnt_off0002ceeb.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CEEB 3752 bytes

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