Malicious PDF — malware analysis report

Static analysis result for SHA-256 2116a689149dd2c1…

MALICIOUS

PDF

184.9 KB Created: 2015-08-05 13:41:23 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: a9f85a2655049aa3d35cb62471dda7bc SHA-1: 94fb01d2d4fff50cc90a9ee857664a1c4e8e53d1 SHA-256: 2116a689149dd2c13cfee96c5540c5f59313b6336b317ffb0da57480cd7bb47e
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, http://botcraftman.ru/, which is designed to lure users into downloading potentially unwanted software or malware. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, and the document body was truncated, limiting further analysis of the exact lure.

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=Solidworks+2013+rus+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304442_samostoyatelnuye_rabotuy_po_russkomu_yazuyku_3_klass.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304555_skachat_besplatno_installapk.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304654_programma_dlya_ustanovki_tem_na_windows_7.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002a3b5.bin
3fce4f2f9b2dadfd0f8ef02639e43094ffe4bfab425cfc95050b2dc476ef1dec		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A3B5 7468 bytes
font_00_sfnt_off00023d35.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23D35 3556 bytes
font_01_sfnt_off00024ab8.bin
9b0f2b6d4a0d09725a1885a2409215186a44895e92cd753c4f8256e19f232c06		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24AB8 14600 bytes
font_02_sfnt_off00027822.bin
56b22c2e9886e2950cf6a7906e19a821a8d67e8a835e88d70b8893b61f96b7b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27822 14752 bytes
font_04_sfnt_off0002b9af.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B9AF 6084 bytes
font_05_sfnt_off0002c944.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C944 3752 bytes

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