Malicious PDF — malware analysis report

Static analysis result for SHA-256 22ae69074c57b400…

MALICIOUS

PDF

186.1 KB Created: 2015-07-24 04:01:58 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: e70d09e557c7de2d09720fd07b512d34 SHA-1: e6cbb2412d31d8fe499929b46527bc00a84b4cb4 SHA-256: 22ae69074c57b40052e72fc84cabfb6ee32207e7fdb0d8552ac8db34c4b602ff
152 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical finding for a redirector link to botcraftman.ru. The ML classifier also assigned a high probability of maliciousness. The ClamAV detection 'Pdf.Dropper.Agent-7493727-0' suggests the file acts as a dropper for further malicious content. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

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-7493727-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7493727-0
  • 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+%D1%81%D1%85%D0%B5%D0%BC%D0%B0+%D1%83%D1%81%D0%B8%D0%BB%D0%B8%D1%82%D0%B5%D0%BB%D1%8F+mystery+mk+280&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4187/4187387_windows_7_skachat_torrent_32_bit_2014_rus_original_dlya_fleshki.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185320_programma_pozharnotehnicheskogo_minimuma.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185515_case_intervyu_primeruy.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002a8e2.bin
cc69c95ecb3f66479a0b4a48344f6b0115f45bd2a7e3d5154ad1a10c6d45dede		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A8E2 7392 bytes
font_00_sfnt_off000241bf.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x241BF 3556 bytes
font_01_sfnt_off00024f42.bin
ceb5dc8d37fcce7fee5d9d887c89add78074083e21390793b5efb9fbda0a232c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24F42 14728 bytes
font_02_sfnt_off00027d19.bin
b9d5c9851d8689da23f892c532b0c4877881e97ca937ce4bc27b035f97b55749		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27D19 14808 bytes
font_04_sfnt_off0002be9e.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BE9E 6084 bytes
font_05_sfnt_off0002ce33.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CE33 3752 bytes

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