Malicious PDF — malware analysis report

Static analysis result for SHA-256 a98a348b3f619f24…

MALICIOUS

PDF

184.2 KB Created: 2015-08-08 12:29:46 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: a8f6f539c192465972fbcbe58eb14ea4 SHA-1: 530adbe914b0a791f785a2f0ac140b23455ecfa8 SHA-256: a98a348b3f619f24657445a289aa8aba180942170b0844daab6e55ef9217a48d
150 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics as malicious, including a critical alert for a link to known malicious redirector infrastructure. The ML classifier also assigned a high probability of maliciousness. The primary malicious indicator is the embedded URL pointing to botcraftman.ru, which is classified as a malicious redirector.

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-8788902-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8788902-0
  • 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%A1%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%A1%D0%B0%D0%BC%D1%81%D1%83%D0%BD%D0%B3+n145+plus+%D0%B4%D1%80%D0%B0%D0%B9%D0%B2%D0%B5%D1%80%D0%B0&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/6//4384/4384671_shema_priemnika_okean_209.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4389/4389943_smeta_na_remont_myagkoy_krovli_obrazec.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4388/4388907_skachat_cs_16_vp4.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002a1b1.bin
56fbc4bb7dbf7efeda7660a0c6a7dbeded86bedaaba798d42c208de0ff667c1d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A1B1 7200 bytes
font_00_sfnt_off00023ce9.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23CE9 3556 bytes
font_01_sfnt_off00024a6c.bin
1e5230f292dc420246bab5273e829d53ecc0d76c1cb00a20a630021ae0c51897		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24A6C 13956 bytes
font_02_sfnt_off00027681.bin
fbdf37bf92a64adb789e92b85e9873292a7aa3fc3a59aef535af8f562c54412e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27681 14640 bytes
font_04_sfnt_off0002b6e3.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B6E3 6084 bytes
font_05_sfnt_off0002c678.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C678 3752 bytes

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