Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4bd4d0f715f628b…

MALICIOUS

PDF

183.2 KB Created: 2015-08-05 17:15:29 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: ccbd88f537e87b9f92aa703f848f85e5 SHA-1: d109c40df4251854ea31a379c9184318eec65428 SHA-256: a4bd4d0f715f628b78d6e141c45da10d2a70a244e804d98f68784eed7259c799
90 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains a critical heuristic indicating a malicious redirector link. The embedded URL `http://botcraftman.ru/?lip&keyword=%D0%B0%D0%BB%D1%84%D0%B0%D0%B2%D0%B8%D1%82+%D0%BF%D0%BE+%D0%BD%D0%B5%D0%BC%D0%B5%D1%86%D0%BA%D0%BE%D0%BC%D1%83&charset=utf-8` is confirmed to point to known malicious infrastructure. No scripts were extracted, but the presence of the malicious link is sufficient evidence of malicious intent.

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%B0%D0%BB%D1%84%D0%B0%D0%B2%D0%B8%D1%82+%D0%BF%D0%BE+%D0%BD%D0%B5%D0%BC%D0%B5%D1%86%D0%BA%D0%BE%D0%BC%D1%83&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/6//4305/4305917_skachat_tmnt_mutant_melee.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4305/4305859_1s_60_skachat_besplatno.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4305/4305257_koduy_na_cveta_v_bubute.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023c62.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23C62 3556 bytes
font_01_sfnt_off000249e5.bin
95761820e29afa7dde2c7481a1b5c7e82a7f2fe7c5e52a9a7afacbc0548dcc0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x249E5 14304 bytes
font_02_sfnt_off00027612.bin
dde8cb3db78f49492d397de1013a074ab9c596bc0508faa33f94bd64189db0ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27612 14468 bytes
font_03_sfnt_off0002a0c5.bin
47a5b8a71af6ac38dd801b75dc2d01bbab8d18f737fc805fe0e5cbd96638d921		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A0C5 6456 bytes
font_04_sfnt_off0002b329.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B329 6084 bytes
font_05_sfnt_off0002c2be.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C2BE 3752 bytes

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