Malicious PDF — malware analysis report

Static analysis result for SHA-256 91521af7ab1aacb3…

MALICIOUS

PDF

185.5 KB Created: 2015-07-24 05:29:39 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: b5bd948c39b7bf1e4f93b6ad186a2862 SHA-1: a37ca79c45fcff8c27c4b6e4f5e5f732375ba02b SHA-256: 91521af7ab1aacb35ef4732680ca7c20951dc72a7537dd55873279249677e794
90 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL, http://botcraftman.ru/..., is confirmed as a malicious redirector, suggesting the document's purpose is to lure users to a harmful site. No scripts were extracted, but the presence of a malicious link is sufficient evidence for this assessment.

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%B4%D0%BE%D0%BC+2+%D1%81%D0%B2%D0%B5%D0%B6%D0%B8%D0%B5+%D1%81%D0%B5%D1%80%D0%B8%D0%B8+%D1%81%D0%BC%D0%BE%D1%82%D1%80%D0%B5%D1%82%D1%8C+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4187/4187946_fifa_13_skachat_torrent_pc_polnaya_versiya_besplatno_na_russkom.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185501_akt_revizii_v_magazine_obrazec_skachat_besplatno.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185554_mac_os_x_109_skachat_torrent_iso.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000242a3.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x242A3 3556 bytes
font_01_sfnt_off00025026.bin
12bd606abc5234ab30139759bf8c855a6eb08e8e7cbde17054600c645dd2827e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25026 14848 bytes
font_02_sfnt_off00027df9.bin
5f26cebd99a9f357234ab2c5ddb410492f8d4d44335671ebcac5bc272b1fd209		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27DF9 14468 bytes
font_03_sfnt_off0002a8aa.bin
cf6919409c16c467b7fd539f15efcaf8f8416b763f3180ae9e54be1946d21953		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A8AA 6804 bytes
font_04_sfnt_off0002bc51.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BC51 6084 bytes
font_05_sfnt_off0002cbe6.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CBE6 3752 bytes

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