Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fb4de93430f242f…

MALICIOUS

PDF

187.0 KB Created: 2015-07-23 20:05:47 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 2d22c2908553e900e2b8e2445f0ecaf6 SHA-1: 3d952391d1e65ec65f74a3ffed02952d4d4c1254 SHA-256: 6fb4de93430f242fd457dd50ef00fc208cff7f4caff326edf024fb3e05cab129
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as a malicious PDF dropper by ClamAV and an ML classifier. It contains a critical heuristic firing for a PDF link to known malicious redirector infrastructure, specifically http://botcraftman.ru/. This indicates the document's primary purpose is to lure the user to this malicious site, likely to initiate a further download or exploit. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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-8787617-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8787617-0
  • 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%BF%D1%80%D0%BE%D0%B3%D1%80%D0%B0%D0%BC%D0%BC%D0%B0+%D0%B2%D1%80%D0%B5%D0%BC%D1%8F+%D1%81%D0%B5%D0%B3%D0%BE%D0%B4%D0%BD%D1%8F%D1%88%D0%BD%D0%B8%D0%B9+%D0%B2%D1%8B%D0%BF%D1%83%D1%81%D0%BA+21+00+%D1%81%D0%BC%D0%BE%D1%82%D1%80%D0%B5%D1%82%D1%8C+%D0%BE%D0%BD%D0%BB%D0%B0%D0%B9%D0%BD&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184367_windows_7_ultimate_x64_skachat_torrent_licenziya.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4183/4183092_lebedi_shema_vuyshivki.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4183/4183182_lampovuyy_tembroblok_shema.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_off000247c2.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x247C2 3556 bytes
font_01_sfnt_off00025545.bin
d13ec936a060af684af5ffc1ec7743c75030b5df8d03354182103a136f252696		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25545 14444 bytes
font_02_sfnt_off00028248.bin
2331ca0b03cd4460423b61d4344a00e7399d001757c3b30c7133cc37c9265dcb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28248 14520 bytes
font_03_sfnt_off0002ad1d.bin
e1127da874ec1dc2220a8cb66f9ab56d72e8a8cee8f7282cdde138b8d9e17cbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AD1D 7236 bytes
font_04_sfnt_off0002c234.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C234 6084 bytes
font_05_sfnt_off0002d1c9.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D1C9 3752 bytes

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