Malicious PDF — malware analysis report

Static analysis result for SHA-256 463d55533a1c68af…

MALICIOUS

PDF

185.3 KB Created: 2015-07-25 18:55:54 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: c20ff6ae0a11539a36bc5f652af6a6da SHA-1: 1f107d9c90f390640ede9ec9645ba16ecc345e5f SHA-256: 463d55533a1c68af3fe9f28670ebf1c6f50a4cc18a4dc8d6610d6b43b97874a2
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 link to known malicious redirector infrastructure. The embedded URL, http://botcraftman.ru/, is the primary indicator of malicious intent. No scripts were extracted, and the document body was not parsable, but the presence of the malicious link is sufficient to classify this as a malicious document. The file type and authoring application suggest it was generated programmatically, likely for distribution.

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%A1%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%80%D1%83%D1%81%D1%81%D0%BA%D1%83%D1%8E+%D0%BE%D0%B7%D0%B2%D1%83%D1%87%D0%BA%D1%83+%D0%B4%D0%BB%D1%8F+prototype&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4186/4186197_upravlenie_assortimentom_v_roznice_suysoeva_skachat_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4190/4190483_bot_dlya_smmkaru.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4186/4186397_obrazec_harakteristiki_na_sportsmena_ot_trenera.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024023.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24023 3556 bytes
font_01_sfnt_off00024da6.bin
bb24a3f34452edb2139c44210cb4cfbb8ed6eee1deddc8cc0c7e56ca3ac3b202		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24DA6 14744 bytes
font_02_sfnt_off00027b49.bin
e31b0253f9bb2b3f78573034b54d2ad330dea4e000156567e1dbcddc738e1a98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27B49 14576 bytes
font_03_sfnt_off0002a65b.bin
25255c203c28c6c5bc5d644824198c78d2f7e7da6efdbf153b743f1815d456b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A65B 7248 bytes
font_04_sfnt_off0002bb7f.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BB7F 6084 bytes
font_05_sfnt_off0002cb14.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CB14 3752 bytes

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