Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1f52e39fba29a54…

MALICIOUS

PDF

185.0 KB Created: 2015-07-24 11:58:22 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: e36d4099cbdf0be7541f3a0bb0a7433a SHA-1: cb5f708e2a2a329b47372398519a72ce940c51b4 SHA-256: b1f52e39fba29a542029db06a44525dec2779fb17d7fd45e3902e51fc176a10f
92 Risk Score

Malware Insights

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

The PDF file was flagged by a critical heuristic for containing a link to known malicious redirector infrastructure. The ML classifier also assigned a high probability of maliciousness. The embedded URL points to 'botcraftman.ru', which is associated with malicious redirector activity. This suggests the document is designed to lure users to a harmful website.

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%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D1%8B%D0%B5+%D0%B0%D0%BA%D0%BA%D0%B0%D1%83%D0%BD%D1%82%D1%8B+world+of+tanks&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184569_erd_commander_dlya_windows_xp_skachat_torrent.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185191_misha_mavashi_skachat_torrent_vse_albomuy.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184485_skachat_besplatno_knigu_na_50_ottenkov_temnee_dlya_android.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002a586.bin
afba107921b611025ff8f8e836c7a8e6345de6cbddef7bbe945c3e6499e1ef48		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A586 7064 bytes
font_00_sfnt_off00023e08.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23E08 3556 bytes
font_01_sfnt_off00024b8b.bin
6d885f009c94fa3424f0053458d66ef088b23e41ec72526510e910eb33abcc5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24B8B 14968 bytes
font_02_sfnt_off000279e0.bin
fa16955dd42db7586f0272dfbddbf3dbba093544d5b48d64c8cb8cc1dfabecc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x279E0 14748 bytes
font_04_sfnt_off0002ba22.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BA22 6084 bytes
font_05_sfnt_off0002c9b7.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C9B7 3752 bytes

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