Malicious PDF — malware analysis report

Static analysis result for SHA-256 541ad9c2dd5f9ad1…

MALICIOUS

PDF

184.1 KB Created: 2015-08-08 09:36:47 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 233a60616dbf9127f21a0b523f6cdd66 SHA-1: abe5d3e3e04624390398056755cfe440f007f6b4 SHA-256: 541ad9c2dd5f9ad1cdc2cdc699c632fca356d76498c4b74b37b5a3eef6bdb4ff
92 Risk Score

Malware Insights

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

The PDF file was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The primary malicious IOC is the embedded URL, which is likely intended to lead the user 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=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%BA%D0%BD%D0%B8%D0%B3%D1%83+%D0%B4%D0%BB%D1%8F+%D0%BB%D0%B0%D0%B4%D0%B0+%D0%BA%D0%B0%D0%BB%D0%B8%D0%BD%D0%B0&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/6//4383/4383712_forma_088_u_06_skachat.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4383/4383698_redsn0w_0915b4_skachat.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4383/4383809_raspisanie_avtobusov_kushva_nizhniy_tagil.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023fa4.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23FA4 3556 bytes
font_01_sfnt_off00024d27.bin
fa34ebe76a1775ef6022b419566f1c2f94904262d48a0a8bca6f94a758cb9171		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24D27 14432 bytes
font_02_sfnt_off00027a69.bin
c33e6903d76079777c1b082a355654bfa5653b97afd40bc3e5344b34556d24bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27A69 14468 bytes
font_03_sfnt_off0002a51b.bin
0784a494102bf5f32e685432a0fc08434b503e4dde003bece321eb705b62cd82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A51B 6200 bytes
font_04_sfnt_off0002b696.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B696 6084 bytes
font_05_sfnt_off0002c62b.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C62B 3752 bytes

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