Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8041cf81a31fb13…

MALICIOUS

PDF

184.6 KB Created: 2015-07-24 11:54:11 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: f60720814149038f1b9487741185e9db SHA-1: 0aa7bdbfb8a095aab2d4b3768b519eb9afa0ff96 SHA-256: a8041cf81a31fb136f5e3811c0966a9dc0aeff5dd360da5d929ff8092e908565
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 link to a known malicious redirector infrastructure. This suggests the document is designed to lure users to a malicious website. No scripts were extracted, and the document body was truncated, limiting further analysis of the exact lure.

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%87%D0%B8%D1%82+%D0%BD%D0%B0+%D0%BA%D1%80%D0%B8%D1%81%D1%82%D0%B0%D0%BB%D0%BB%D1%8B+%D0%B4%D0%BB%D1%8F+%D1%82%D0%B0%D0%BD%D0%BA%D0%B8+%D0%BE%D0%BD%D0%BB%D0%B0%D0%B9%D0%BD&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4191/4191758_skachat_moduy_na_farming_simulyator_2015_besplatno.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185267_volfenshtayn_2015_prohozhdenie.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4192/4192203_test_po_matematike_3_klass_na_kazahskom_yazuyke.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024143.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24143 3556 bytes
font_01_sfnt_off00024ec6.bin
6cc6f7da845801988c1f827ea08f83174c62efd4fd586032f0a2a1e33f123902		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24EC6 14180 bytes
font_02_sfnt_off00027b4a.bin
971c53d0a811faa959b8e1956257577f9e2fbaf43c25165a594517346b84c1e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27B4A 14580 bytes
font_03_sfnt_off0002a655.bin
7a8abd9c33966649837183be7cafbdf29e86f0c0f2f8a3cc54fe068154b7e3ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A655 6408 bytes
font_04_sfnt_off0002b873.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B873 6084 bytes
font_05_sfnt_off0002c808.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C808 3752 bytes

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