Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4ae5fdb4645802b…

MALICIOUS

PDF

187.6 KB Created: 2015-07-25 23:05:00 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: b7c3cb4f6a960722789531e140a8cc89 SHA-1: 5d08c6cd2c935c17bb6d7083167651dde06db859 SHA-256: a4ae5fdb4645802b7239cd88d094952b287c6f03f4e11e8f0ba20d7ed40b15c8
90 Risk Score

Malware Insights

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

The PDF file was flagged by a critical heuristic for containing a link to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL, http://botcraftman.ru/..., is the primary indicator of compromise, likely serving as a lure to a phishing or malware distribution site. No scripts were extracted from this sample.

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=%D0%BE%D1%81%D1%82%D1%80%D0%BE%D0%B2+%D0%BD%D0%B5%D0%BD%D1%83%D0%B6%D0%BD%D1%8B%D1%85+%D0%BB%D1%8E%D0%B4%D0%B5%D0%B9+2+%D1%81%D0%B5%D0%B7%D0%BE%D0%BD+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82+%D0%B2%D1%81%D0%B5+%D1%81%D0%B5%D1%80%D0%B8%D0%B8&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4192/4192292_skachat_igru_lego_marvel_supergeroi_cherez_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4206/4206867_1_s_buhgalteriya_82_skachat_besplatno_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4192/4192277_progorod_dlya_android_klyuch.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024919.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24919 3556 bytes
font_01_sfnt_off0002569c.bin
7d93cbf51b3562d6fe3bcdc5439d9c9eaf1db2abf8b96f40953c989033a7f331		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2569C 14472 bytes
font_02_sfnt_off00028410.bin
09e587be0aa19e1950d954a127cafb98008412c4cbe3d89ca703950516d50063		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28410 14532 bytes
font_03_sfnt_off0002af00.bin
2780e296df8f5c8e973a7927b982d550289ce74cac42c9faef09faf1155fae04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AF00 7364 bytes
font_04_sfnt_off0002c48d.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C48D 6084 bytes
font_05_sfnt_off0002d422.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D422 3752 bytes

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