Malicious PDF — malware analysis report

Static analysis result for SHA-256 8eb8b37d3b8f858d…

MALICIOUS

PDF

185.4 KB Created: 2015-07-23 19:37:24 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 10cbd643bdd29f5480f2e5a77e929895 SHA-1: 4671c55a6cfd9e1240d7c535d44618fe07b96701 SHA-256: 8eb8b37d3b8f858d2bc24786d990038ef8cb564af32e3883ff661be34c7dd4bb
90 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a link to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The embedded URL points to botcraftman.ru, which is associated with malicious redirects. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link within the PDF.

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%BF%D1%80%D0%BE%D0%B3%D1%80%D0%B0%D0%BC%D0%BC%D1%83+%D0%B4%D0%BB%D1%8F+%D0%BD%D0%B0%D1%81%D1%82%D1%80%D0%BE%D0%B9%D0%BA%D0%B8+%D1%81%D0%B0%D0%B1%D0%B2%D1%83%D1%84%D0%B5%D1%80%D0%B0&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4183/4183259_primer_rascheta_strahovuyh_vznosov_2013.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4183/4183251_ciklicheskiy_algoritm_blok_shema_primeruy.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184287_shpargalki_po_algebre_egye_2015.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000242a0.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x242A0 3556 bytes
font_01_sfnt_off00025023.bin
d9694a8f5f19ec147277a681d6d9ec6682594e8a18e6a6ca9960524454cf183f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25023 13800 bytes
font_02_sfnt_off00027bc2.bin
c33e6903d76079777c1b082a355654bfa5653b97afd40bc3e5344b34556d24bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27BC2 14468 bytes
font_03_sfnt_off0002a674.bin
cc6b0a48e7c83353cad30ad0d95549afbdcc786155574d7750c33a3182e54605		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A674 7300 bytes
font_04_sfnt_off0002bbd3.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BBD3 6084 bytes
font_05_sfnt_off0002cb68.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CB68 3752 bytes

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