Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b44a8ab62177a36…

MALICIOUS

PDF

187.9 KB Created: 2015-07-23 23:49:44 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: ecc373a119d1ddbd594aca29ddda4b64 SHA-1: c97b90217a88a2051275228a38d76b3138974af7 SHA-256: 0b44a8ab62177a36a84479aeee1a72c568531016836775f11c2afed80d61b700
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and contains a link to known malicious infrastructure. The PDF likely functions as a dropper, redirecting the user to 'http://botcraftman.ru/' to initiate a download of a secondary payload. No scripts were extracted, but the presence of a malicious redirector is a strong indicator of a downloader or droppper functionality.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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-7677110-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7677110-0
  • 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%A8%D0%B0%D0%B1%D0%BB%D0%BE%D0%BD+%D1%82%D0%B0%D0%B1%D0%BB%D0%B8%D1%87%D0%BA%D0%B8+%D0%B5%D1%81%D0%BB%D0%B8+%D0%B2%D0%B0%D0%BC+%D0%BC%D0%B5%D1%88%D0%B0%D0%B5%D1%82+%D0%BC%D0%BE%D0%B9+%D0%B0%D0%B2%D1%82%D0%BE%D0%BC%D0%BE%D0%B1%D0%B8%D0%BB%D1%8C+%D1%80%D0%B0%D1%81%D0%BF%D0%B5%D1%87%D0%B0%D1%82%D0%B0%D1%82%D1%8C&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185535_rezultatuy_zno_po_matematike_2015_god.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185543_nightwish_skachat_besplatno_vse_albomuy.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184455_stivenson_vereskovuyy_med_skachat_fb2.pdf
    • http://www.microsoft.com/typography/fonts/
    • http://www.microsoft.com/typography/fonts/You

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024ae6.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24AE6 3556 bytes
font_01_sfnt_off00025869.bin
7647a30db8bdc65e7584a9ed7e8be6fc815d9a58f467c3ffc69281536f8c9a59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25869 14976 bytes
font_02_sfnt_off00028748.bin
0de5a4fe66ebc4963d1989687b9e12bbbdd52b614ad2f6a56b82eadf65d98a13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28748 14580 bytes
font_03_sfnt_off0002b23f.bin
8d192f13f12c034c97b9db6c6dd7fa32c8be9356c3a5fd89e4143028efa0facf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B23F 6828 bytes
font_04_sfnt_off0002c5bf.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C5BF 6084 bytes
font_05_sfnt_off0002d554.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D554 3752 bytes

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