Malicious PDF — malware analysis report

Static analysis result for SHA-256 83899b6931248820…

MALICIOUS

PDF

187.3 KB Created: 2015-07-23 21:15:16 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 7d07bc01f413b39fa5b5ef694cd180eb SHA-1: b800efa5c9853a7a224eae4d3fd8a79f4f20b3f5 SHA-256: 83899b6931248820b27eb5a2a7f719895b3ab26b892baa5a7736d44808e2b0ee
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, indicating an attempt to lure the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the critical heuristic firing suggest a phishing or redirection attempt, likely delivered as a spearphishing attachment.

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%B6%D0%B8%D0%B2%D1%8B%D0%B5+%D0%BE%D0%B1%D0%BE%D0%B8+%D0%BD%D0%B0+%D1%80%D0%B0%D0%B1%D0%BE%D1%87%D0%B8%D0%B9+%D1%81%D1%82%D0%BE%D0%BB+%D0%B4%D0%BB%D1%8F+windows+8+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4183/4183198_landshaftnuyy_dizayn_proekt.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184520_velikolepnuyy_vek_5_sezon_skachat_cherez_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184617_skachat_vord_probnuyu_versiyu_besplatno.pdf
    • http://www.microsoft.com/typography/fonts/You
    • http://www.microsoft.com/typography/fonts/

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002ac91.bin
b8b2af9795de02feb57c436bf237fe72f4db3de98296420411c84c689baa7000		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2AC91 7740 bytes
font_00_sfnt_off000244f0.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x244F0 3556 bytes
font_01_sfnt_off00025273.bin
0881a3659043042c63e9a9f293d4ccb8c89f8d331a5ba3f5fc2e1b44ab97caa7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25273 14744 bytes
font_02_sfnt_off000280f1.bin
d1ba038f7b611b2cddbb5265db484fc2ead9f9346980095e2893b2582fb44d8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x280F1 14776 bytes
font_04_sfnt_off0002c34c.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C34C 6084 bytes
font_05_sfnt_off0002d2e1.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D2E1 3752 bytes

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