Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1ef3652a6c87808…

MALICIOUS

PDF

185.2 KB Created: 2015-08-08 11:41:32 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: d7aa8a02968b04ea1b62d76eceac1d40 SHA-1: 2929f714790e68c7fd9f5e5295ac18e647ce1134 SHA-256: d1ef3652a6c87808010e7299d19567de60988889e06a6b2c98f60cc64267cdd3
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical alert for a malicious redirector link. The ML classifier also assigned a high probability of maliciousness. The primary malicious indicator is the embedded URL pointing to botcraftman.ru, which is known malicious infrastructure. No scripts were extracted, and the document body was truncated, limiting further analysis of the delivery mechanism.

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-7522659-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7522659-0
  • 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=923709+%D1%81%D1%85%D0%B5%D0%BC%D0%B0+%D0%BF%D0%BE%D0%B4%D0%BA%D0%BB%D1%8E%D1%87%D0%B5%D0%BD%D0%B8%D1%8F&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/6//4385/4385943_skachat_besplatno_windows_mobile_50.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4388/4388120_do_vstrechi_s_toboy_dzhodzho_moyes_skachat.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4385/4385799_tutu_ru_raspisanie_poezdov_dalnego_sledovaniya.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023fe8.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23FE8 3556 bytes
font_01_sfnt_off00024d6b.bin
e46813441d9a632ca54ff04a31efb935ab9c4e852d660ea432a23321a3ce7e52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24D6B 14712 bytes
font_02_sfnt_off00027bc1.bin
4050f6fb69b3fa022b6416bf55d6ffa258dd429b1c848fb4e82ea9473454fca3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27BC1 14580 bytes
font_03_sfnt_off0002a6de.bin
31cb00341a4c02e04ee6990fca15e7361d063bd06e49576346dfe1274e5ddaf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A6DE 6980 bytes
font_04_sfnt_off0002bb20.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BB20 6084 bytes
font_05_sfnt_off0002cab5.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CAB5 3752 bytes

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