Malicious PDF — malware analysis report

Static analysis result for SHA-256 91b342d64bffd715…

MALICIOUS

PDF

187.5 KB Created: 2015-07-24 12:09:01 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: b91e6f3b8733de2dc10c80504fecc555 SHA-1: 5b0c70882fb32d357475a6c7fcce328c42fd6d1c SHA-256: 91b342d64bffd715ad2dfb5cf596163cdd04d04d25ec08d66fd0de2bd2af6437
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 finding for a malicious redirector link. The ML classifier also assigned a high probability of maliciousness. The embedded URL points to a known malicious redirector, indicating the document's primary purpose is to lure users to a compromised site. No scripts were extracted from this sample.

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-8788403-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8788403-0
  • 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%D0%B0%D1%83%D0%BB%D0%BE+%D0%BA%D0%BE%D1%8D%D0%BB%D1%8C%D0%BE+%D0%B0%D0%B4%D1%8E%D0%BB%D1%8C%D1%82%D0%B5%D1%80+%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+epub&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4189/4189228_google_earth_dlya_android_skachat.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4186/4186950_skachat_maynkraft_152_cherez_torrent_besplatno_bez_virusov.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4191/4191735_signalizaciya_starline_instrukciya_po_yekspluatacii_a91.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024732.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24732 3556 bytes
font_01_sfnt_off000254b5.bin
3d1ba21b30e8fe23962b0c7a94bca43ebde80c440ef59d046b728b5e9fbe00ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x254B5 15520 bytes
font_02_sfnt_off00028469.bin
8a9e75bde775c2938fb2e3d20b94a3a82a31316f3325fed17e932b25934ce204		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28469 14596 bytes
font_03_sfnt_off0002af76.bin
8baeb514c26e11770e6c2edef809ec47201eb132c8238ce14b7a794ac8642e2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AF76 7136 bytes
font_04_sfnt_off0002c42e.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C42E 6084 bytes
font_05_sfnt_off0002d3c3.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D3C3 3752 bytes

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