Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb9abdc8bda9a7d0…

MALICIOUS

PDF

186.5 KB Created: 2015-07-24 20:56:10 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 1be05491766262a4586676dc69ec78d0 SHA-1: 7f40d392edb60be9bd9d51c327e22d7facf27bb9 SHA-256: bb9abdc8bda9a7d089c50e09a00883ce4b6f66cc0cb0e2a3a7c308d58ab407c8
90 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, specifically for containing a link to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The primary IOC is the malicious URL, which is likely used to redirect users to a phishing or malware hosting site. No scripts were extracted, and the document body was not parsable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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%B2%D0%B7%D0%BB%D0%BE%D0%BC%D0%B0+%D0%B2+%D0%BA%D0%BE%D0%BD%D1%82%D0%B0%D0%BA%D1%82%D0%B5+%D0%BD%D0%B0+%D0%B3%D0%BE%D0%BB%D0%BE%D1%81%D0%B0+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4193/4193199_koduy_na_skayrim_na_prevraschenie_v_drakona.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4188/4188617_raschet_bolnichnogo_lista_v_2015_godu_primeruy_rascheta.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4194/4194649_posmotret_rezultatuy_gia_po_matematike_2015_9_klass.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002474b.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2474B 3556 bytes
font_01_sfnt_off000254ce.bin
b978d69d3c4f5a3cad4be5ab2dd6cd7add82322c12b6175f41dde9dac864f1a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x254CE 14332 bytes
font_02_sfnt_off00028211.bin
c33e6903d76079777c1b082a355654bfa5653b97afd40bc3e5344b34556d24bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28211 14468 bytes
font_03_sfnt_off0002acc3.bin
6fd0003e64819f412519fbb1d1f70cc7e64f3c19e1e5c7f54e722d88f46958fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2ACC3 6744 bytes
font_04_sfnt_off0002c041.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C041 6084 bytes
font_05_sfnt_off0002cfd6.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CFD6 3752 bytes

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