Malicious PDF — malware analysis report

Static analysis result for SHA-256 27a655115bb47654…

MALICIOUS

PDF

182.9 KB Created: 2015-08-08 10:56:32 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: d250be5fda6a17067514a24da629f7c8 SHA-1: a399e71413416c50ff64185d8592342c3eebb187 SHA-256: 27a655115bb47654ea2a4fcf1b17b42e0da02517c15747385bcb9c58b0f8e4fe
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'http://botcraftman.ru/'. This indicates the document is designed to lure users to a malicious site, likely for the purpose of delivering a secondary payload. The ML classifier also strongly flagged this PDF as malicious, and ClamAV detected it as a dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 3

  • 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.
  • ClamAV: Pdf.Dropper.Agent-7533159-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7533159-0
  • 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=7800+%D1%87%D0%B5%D0%B9+%D0%BA%D0%BE%D0%B4&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/6//4385/4385165_skachat_igru_left_4_dead_2_cherez_zona.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4383/4383771_remielinizaciya_vosstanovlenie_mielina.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4386/4386435_defender_c_090.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023a14.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23A14 3556 bytes
font_01_sfnt_off00024797.bin
d0dd17106c8b26d78f6d5a510d7f3b103754a1a4e0d3aefb2fe05d01a8d103d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24797 15048 bytes
font_02_sfnt_off0002761d.bin
19efee7f36259c9f2a5360d91c844a660f9d06fb301d5a9794efdf6855fe3e19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2761D 14512 bytes
font_03_sfnt_off0002a100.bin
33d5d3ae12660a9190a03baa00e9867efbd09e77ac17a3c00d125349dd96d882		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A100 6072 bytes
font_04_sfnt_off0002b1e4.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B1E4 6084 bytes
font_05_sfnt_off0002c179.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C179 3752 bytes

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