Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a7791bad524fb74…

MALICIOUS

PDF

184.6 KB Created: 2015-08-08 09:44:35 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: c130f87cb36a38df82eb23c94043f2f2 SHA-1: c269625891a076e4bde29b48b3f3f0ff413959c7 SHA-256: 4a7791bad524fb7417c1428f51a4281a595b2765acb826bb491a69dec98fba1e
90 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, botcraftman.ru, which is disguised as a game download. This heuristic firing, combined with the ML classifier's high confidence, strongly suggests a phishing or social engineering attack. No scripts were extracted, limiting the analysis of further malicious behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 2

  • 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.
  • 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=german+truck+simulator+132+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/6//4384/4384300_shablonuy_gramot_dlya_detey_skachat_besplatno.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4384/4384292_avtomaticheskaya_ustanovka_prilozheniy_android.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4383/4383948_skachat_kartu_kazahstana_dlya_navitel_besplatno_2013.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002a366.bin
c08992d290d2f0acc3e7952728afef43408cf4d5931399a9afade61d2749f75b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A366 7248 bytes
font_00_sfnt_off00023c55.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23C55 3556 bytes
font_01_sfnt_off000249d8.bin
e89262972d884ecab84d90e8b42733f4bd14170941aa6752d0836fc929bf9092		 pdf-font-stream PDF embedded font (sfnt) at offset 0x249D8 14732 bytes
font_02_sfnt_off0002776b.bin
7630c06c07c295cfa0ff1795b1d44a9a6b8513789914473d8692ff2884725ec1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2776B 14892 bytes
font_04_sfnt_off0002b8a7.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B8A7 6084 bytes
font_05_sfnt_off0002c83c.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C83C 3752 bytes

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