Malicious PDF — malware analysis report

Static analysis result for SHA-256 ada70f8bcf90df51…

MALICIOUS

PDF

187.8 KB Created: 2015-07-25 06:35:49 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 35c061bbdff5f7a4665defb42f8ab82e SHA-1: b66cc61f5dddddb6e0ca87f26cd83787868dd18a SHA-256: ada70f8bcf90df51b9dd128d086717f59ac84feb8cd70764f73abe54d8bc5050
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to botcraftman.ru. This indicates the document's primary purpose is to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is sufficient evidence for the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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+%D0%BA%D0%B0%D1%80%D0%B1%D0%B0%D0%BB%D0%B5%D0%B2%D0%B8%D1%87+%D0%B0%D0%BB%D0%B5%D0%BA%D1%81%D0%B0%D0%BD%D0%B4%D1%80+%D0%BB%D1%83%D0%BA%D0%B0%D1%88%D0%B5%D0%BD%D0%BA%D0%BE+%D0%BF%D0%BE%D0%BB%D0%B8%D1%82%D0%B8%D1%87%D0%B5%D1%81%D0%BA%D0%B8%D0%B9+%D0%BF%D0%BE%D1%80%D1%82%D1%80%D0%B5%D1%82&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4197/4197099_tuysyacheletnee_gostepriimstvo_charlz_holl_skachat_knigu.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4200/4200134_koduy_na_gta_4_na_mashinuy_russkie.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4200/4200746_yekzamen_po_angliyskomu_v_aspiranturu.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024c93.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24C93 3556 bytes
font_01_sfnt_off00025a16.bin
a3e22688bc1107b57cce68b06fa5d7b1efa9f41bc23a6fe62e7c5c02fb722e4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25A16 14152 bytes
font_02_sfnt_off000286aa.bin
8c5e5bc4674cee60ec6c1619e60533ff44be00efca6b5f228c587d2f19a61a12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x286AA 14520 bytes
font_03_sfnt_off0002b179.bin
371961907b8e2d89ee3c7df3925c8a4e74d06c3c521dd538bc583d61197223ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B179 6920 bytes
font_04_sfnt_off0002c570.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C570 6084 bytes
font_05_sfnt_off0002d505.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D505 3752 bytes

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