Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ada642ffaca02d9…

MALICIOUS

PDF

191.4 KB Created: 2015-07-23 19:26:39 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 1cf8e655cdb3951863fff94bfb79ce08 SHA-1: d5f4dc6e6ae0fbfb1f31267f926f14fa5bfc4e7d SHA-256: 7ada642ffaca02d9d75ff1ab5e37b5814792b1bfd221895bf4eecf4effac594c
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL points to botcraftman.ru, which is identified as a malicious redirector. No scripts were extracted, and the document body was truncated, but the presence of the malicious link is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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%B8%D0%B3%D1%80%D1%8B+%D0%BD%D0%B0+%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%B8%D1%85+%D0%BC%D0%B0%D1%88%D0%B8%D0%BD%D0%B0%D1%85+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4183/4183260_shema_ponizhayuschego_transformatora.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4183/4183197_kursovoy_proekt_po_gazosnabzheniyu.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4183/4183252_proekt_doma_yelbrus.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00025cd4.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25CD4 3556 bytes
font_01_sfnt_off00026a57.bin
2c3723b13401c3ac18a7213f583b4142ff6062dc6ddc8ef3754088ca0b5cdf21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x26A57 13972 bytes
font_02_sfnt_off0002960e.bin
2394467103986aaa29baa3a1ddab69da91272c1f48d7eb48d3b20692bbf6118a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2960E 14588 bytes
font_03_sfnt_off0002c125.bin
33fb0b2c08f5e593a910af04ffca1d9537b3b6bbeaebaec878563310c29c2b9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C125 6544 bytes
font_04_sfnt_off0002d3d0.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D3D0 6084 bytes
font_05_sfnt_off0002e365.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E365 3752 bytes

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