Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e85455bda56d6ef…

MALICIOUS

PDF

186.7 KB Created: 2015-08-08 11:49:40 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: c96b0e4800078d499216cb9fddb84271 SHA-1: 18dc9af426e5eed3ac2d8240dff70fbc25e9b963 SHA-256: 9e85455bda56d6ef6cb0c3a8a4865dfe2103cd717fdbe44bcc0324b4563e7fd7
90 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, specifically due to a link to a known malicious redirector infrastructure at botcraftman.ru. The ML classifier also strongly indicated maliciousness. The document body content is not human-readable and appears to be artifact data from the wkhtmltopdf tool, providing no direct clues about the user-facing lure. No scripts were extracted from this sample. The primary attack vector appears to be the embedded malicious URL.

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%B2%D0%B8%D0%BD%D0%B4%D0%BE%D0%B2%D1%81+7+%D1%83%D0%BB%D1%8C%D1%82%D0%B8%D0%BC%D0%B0%D1%82%D1%83%D0%BC+64+%D0%B1%D0%B8%D1%82+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE+%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://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/6//4388/4388790_ustanovka_navitel_na_iphone.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4384/4384401_tekstovuye_kvestuy_onlayn.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4386/4386932_kv888111_skachat.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000245e3.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x245E3 3556 bytes
font_01_sfnt_off00025366.bin
f7d7998d829fb863ee8ca21f2259ba1bb42f48d863627727da1d593d82ce3be4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25366 14744 bytes
font_02_sfnt_off000280e9.bin
b8176afe5912d210cb3e0b508a4fa4a2b1941855ae8f482879b99e2d8fe350f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x280E9 14512 bytes
font_03_sfnt_off0002abcd.bin
d64349b4339bfb98f97983fb74d60a11b6126e077447af297027d862ccc6afad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2ABCD 7256 bytes
font_04_sfnt_off0002c116.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C116 6084 bytes
font_05_sfnt_off0002d0ab.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D0AB 3752 bytes

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