Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd357a16d73284d6…

MALICIOUS

PDF

186.0 KB Created: 2015-07-24 13:35:41 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: d4661b0d02d1c0a4415ab3d71a4b786d SHA-1: 8d0ff4d97367bcd06ad1659b8803b78c9f242020 SHA-256: cd357a16d73284d6b1dc3bb3ba6bbc9f827f797e71422669e8e1174ad67eff70
150 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics as malicious, including a critical finding for a link to known malicious redirector infrastructure. The ML classifier also assigned a high probability of maliciousness. The primary IOC is the suspicious URL embedded within the document, which is likely used to lead the user to a malicious site.

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-8789544-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8789544-0
  • 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%92%D0%BE%D0%BB%D0%BA%D0%B8+%D0%BA%D0%B0%D0%BB%D1%8C%D0%B8+%D0%B0%D1%83%D0%B4%D0%B8%D0%BE%D0%BA%D0%BD%D0%B8%D0%B3%D0%B0+%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/5//4186/4186440_testuy_po_algebre_8_klass_s_otvetami.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4186/4186647_egye_po_himii_2015_401_variant_probnuyy.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4190/4190733_programmuy_dlya_pereproshivki_android.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024643.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24643 3556 bytes
font_01_sfnt_off000253c6.bin
92ec56629f734f0dd65c56bb1b808b27dfd8280a1ae56761df0a780a271da454		 pdf-font-stream PDF embedded font (sfnt) at offset 0x253C6 14648 bytes
font_02_sfnt_off0002818a.bin
b1e1cc546f0f1eacb0fa825f4ffec9a121aa6720056131ecd420011035d35d0d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2818A 14680 bytes
font_03_sfnt_off0002ac50.bin
5b4adc7b35a7d699275662bbe2995e2d95405c55c5a96eb64b94698514376274		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AC50 6300 bytes
font_04_sfnt_off0002be1f.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BE1F 6084 bytes
font_05_sfnt_off0002cdb4.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CDB4 3752 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.