Malicious PDF — malware analysis report

Static analysis result for SHA-256 436b3702cb579426…

MALICIOUS

PDF

187.6 KB Created: 2015-08-05 13:24:07 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: e99b0c503ba553d6e2b48dca9fe53721 SHA-1: 7efe4cf3d0d8f00eeac4cba240af1241f2a09dd9 SHA-256: 436b3702cb57942684eba9085f6c357ced98139e0c69138acc744699e3e088dd
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to botcraftman.ru. This indicates the document's primary purpose is to lure the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL is sufficient evidence for this assessment.

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-7521945-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7521945-0
  • 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=%D0%BF%D1%80%D0%BE%D0%B3%D1%80%D0%B0%D0%BC%D0%BC%D0%B0+%D0%B4%D0%BE%D1%81%D1%82%D1%83%D0%BF%D0%BD%D0%BE%D0%B5+%D0%B6%D0%B8%D0%BB%D1%8C%D0%B5+%D0%BC%D0%BE%D0%BB%D0%BE%D0%B4%D1%8B%D0%BC+%D1%81%D0%B5%D0%BC%D1%8C%D1%8F%D0%BC&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304478_skachat_kartu_na_maynkraft_18_gorod_moskva.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304458_root_explorer_219_skachat.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304433_igra_avatar_skachat_torrent.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024a74.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24A74 3556 bytes
font_01_sfnt_off000257f7.bin
7729be2e22be6d43a6424ee38bb3b4927cf4691aa0e317d264ebab8e290af2e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x257F7 14816 bytes
font_02_sfnt_off00028636.bin
b79d56b22a3d37edc4793e81e28af2d51416733c1decb699be69ae0b1e9dff38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28636 14468 bytes
font_03_sfnt_off0002b0e5.bin
be432877428aa2e6511adfaf7fe1ab037d0baefde2f8094446c71747d912f804		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B0E5 6800 bytes
font_04_sfnt_off0002c47c.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C47C 6084 bytes
font_05_sfnt_off0002d411.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D411 3752 bytes

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