Malicious PDF — malware analysis report

Static analysis result for SHA-256 c444f7c4f44b155c…

MALICIOUS

PDF

188.5 KB Created: 2015-07-23 20:53:05 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 1072c8a4c4ce66830b19d9ee3f4df66d SHA-1: 0f2ed859a95f7a4b988bd280f7171ce04e774f0c SHA-256: c444f7c4f44b155ca18b83747ccc45dde17c8c89dfce3cde57f0ab4a73930ebf
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and a machine learning classifier, as malicious. A critical heuristic identified a direct link to known malicious redirector infrastructure at http://botcraftman.ru/. This indicates the PDF's primary function is to redirect the user to a dangerous site, likely for further exploitation or phishing.

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-7494761-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7494761-0
  • 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=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%BF%D1%80%D0%BE%D0%B3%D1%80%D0%B0%D0%BC%D0%BC%D1%83+%D0%B4%D0%BB%D1%8F+%D0%BD%D0%B0%D0%BA%D1%80%D1%83%D1%82%D0%BA%D0%B8+%D0%BB%D1%8E%D0%B4%D0%B5%D0%B9+%D0%B2+%D0%B3%D1%80%D1%83%D0%BF%D0%BF%D1%83+%D0%B2%D0%BA%D0%BE%D0%BD%D1%82%D0%B0%D0%BA%D1%82%D0%B5&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184495_uroki_po_russkomu_yazuyku_5_klass_laduyzhenskaya_fgos.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184558_skachat_fl_studio_11_na_russkom_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184551_vozvraschenie_na_tainstvennuyy_ostrov_2_klyuch.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024dcf.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24DCF 3556 bytes
font_01_sfnt_off00025b52.bin
586291fc1404088f04e7a63ba8acdc8f004cae622ebd56246660c5d56f4fd942		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25B52 14580 bytes
font_02_sfnt_off0002896b.bin
4ae165705ecc41720893a92c6e94e3ee89b3be36a12e4a920505046f59c61edc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2896B 14468 bytes
font_03_sfnt_off0002b419.bin
50d452e9fe6e2252f3a3967f26e55cc903e57e37770d5ad6da21fd0d0be4f69c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B419 6996 bytes
font_04_sfnt_off0002c861.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C861 6084 bytes
font_05_sfnt_off0002d7f6.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D7F6 3752 bytes

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