Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd8ad4bcb70dac11…

MALICIOUS

PDF

187.4 KB Created: 2015-07-24 08:52:57 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: f89b2d86de4b1981dd76ba58ea239cdd SHA-1: 4a041efce3449a6a478cb96eeb218946d03a03d6 SHA-256: cd8ad4bcb70dac110ab08d793c580205b1e9db8abda2ecf9412845bce10da6ea
90 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, botcraftman.ru. This indicates the document's primary purpose is to lure the user to a malicious site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, limiting further analysis of the payload.

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=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%BB%D0%B8%D1%86%D0%B5%D0%BD%D0%B7%D0%B8%D0%BE%D0%BD%D0%BD%D1%8B%D0%B9+%D0%BA%D0%BB%D1%8E%D1%87+%D0%B4%D0%BB%D1%8F+avast+free+antivirus+%D0%B4%D0%BE+2038&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4189/4189966_skachat_kaha_2_sezon_vse_serii_cherez_torrent.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4189/4189091_skachat_daemon_tools_lite_dlya_windows_8.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185282_hidesoft_net_vkracker_6_skachat.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002ab50.bin
80d7d6f8e91317c3d72ada0b8acce84a1127a7e083514a1e4314860a53b874ed		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2AB50 8196 bytes
font_00_sfnt_off00024323.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24323 3556 bytes
font_01_sfnt_off000250a6.bin
60517a16e13ac82608546b53743aad29bed0cdb4e5865540a9d720b26201d6c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x250A6 15160 bytes
font_02_sfnt_off00027fb7.bin
47abea7801b499b7c2a3977bf0c8c0bcd0a15230e5ee41fcd7f305eba992e7b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27FB7 14724 bytes
font_04_sfnt_off0002c3ac.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C3AC 6084 bytes
font_05_sfnt_off0002d341.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D341 3752 bytes

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