Malicious PDF — malware analysis report

Static analysis result for SHA-256 91a9112a1b3d4546…

MALICIOUS

PDF

185.2 KB Created: 2015-07-24 15:43:41 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 3624e5087b285d3cae4e39b646c13603 SHA-1: 86d742a0b213f61f08d79eb3bb168d55c4c5314c SHA-256: 91a9112a1b3d454688ebaf4c676d176a98a802b103f647ac0a65970777cc5f59
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also assigned a high probability of maliciousness. The embedded URL points to 'botcraftman.ru', which is identified as a malicious redirector. This suggests the document's primary purpose is to lure users to a harmful website.

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%83%D1%87%D0%B5%D0%B1%D0%BD%D0%B8%D0%BA+%D0%BF%D0%BE+%D0%B0%D0%BD%D0%B3%D0%BB%D0%B8%D0%B9%D1%81%D0%BA%D0%BE%D0%BC%D1%83+%D1%8F%D0%B7%D1%8B%D0%BA%D1%83&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185317_yemulyator_ps2_dlya_windows_7_skachat_torrent.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4191/4191998_skachat_spin_tires_2015_polnuyu_versiyu_cherez_torrent.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4183/4183248_ir2121_shema.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002421b.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2421B 3556 bytes
font_01_sfnt_off00024f9e.bin
764b88a5eaa76d5c8e9f62c194415b8209d87038639b6aa2cea604dfe8e773d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24F9E 14368 bytes
font_02_sfnt_off00027cc5.bin
c33e6903d76079777c1b082a355654bfa5653b97afd40bc3e5344b34556d24bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27CC5 14468 bytes
font_03_sfnt_off0002a777.bin
7712e9918505c27de641db9004244f44f85148ac523180fe8f7f104bc53eff85		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A777 6824 bytes
font_04_sfnt_off0002bb08.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BB08 6084 bytes
font_05_sfnt_off0002ca9d.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CA9D 3752 bytes

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