Malicious PDF — malware analysis report

Static analysis result for SHA-256 f272fdef1375d204…

MALICIOUS

PDF

184.3 KB Created: 2015-08-05 13:20:02 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: cc3ccc57ce76111b2f118f7bd58a5d0f SHA-1: cb336fd8c8d82d848d77afbef11a131a600a204f SHA-256: f272fdef1375d20429d34bd750a43271880d45b0e0c114ad97ba2c8c00e608e8
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 `http://botcraftman.ru/?lip&keyword=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE+rust&charset=utf-8` is the primary indicator of malicious intent. No scripts were extracted, and the document body was not parsable.

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%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE+rust&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304449_kamasutra_polnaya_versiya.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304441_raspisanie_avtobusov_g_prokopevska.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304448_skachat_antichit_ucp_81_dlya_css_v34.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002a44e.bin
75eb818f54450301e25c57eaaf5a0cc662de4e425d6c8bc6c314181c838ee620		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A44E 6692 bytes
font_00_sfnt_off00023d6b.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23D6B 3556 bytes
font_01_sfnt_off00024aee.bin
aac4538678f982a0b40d19b9b3a1bde882290242979608482c40aae48042d69d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24AEE 14692 bytes
font_02_sfnt_off0002793d.bin
9adf627c397667d7c9c329502ec59c4a233da5b64b04aae1aa1cfe238a804872		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2793D 14576 bytes
font_04_sfnt_off0002b78b.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B78B 6084 bytes
font_05_sfnt_off0002c720.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C720 3752 bytes

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