Malicious PDF — malware analysis report

Static analysis result for SHA-256 e68c3b0db1645ed0…

MALICIOUS

PDF

183.3 KB Created: 2015-08-08 10:57:51 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: e1f8e47a826e12447434b354928500ab SHA-1: 631fc306dc9e9ccca59b5c24f197e8820589fdaa SHA-256: e68c3b0db1645ed07d4695fb86f9da75cab43780f542499fb3acddda7fab6b4d
152 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a critical alert for a malicious redirector link pointing to 'http://botcraftman.ru/'. The ML classifier also assigned a high probability of maliciousness. The embedded content appears to be malformed or truncated, but the presence of the malicious URL is sufficient evidence of a malicious intent, likely to redirect the user to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 3

  • 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.
  • ClamAV: Pdf.Dropper.Agent-8790123-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8790123-0
  • 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%D1%83%D1%80%D0%B0+33+%D0%B0%D1%8F%D1%82+35+%D1%82%D0%B5%D0%BA%D1%81%D1%82&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/6//4384/4384063_skachat_besplatno_film_karusel.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4386/4386142_navitel_5_dlya_windows_ce_60_torrent.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4385/4385923_heroes_of_might_and_magic_6_skachat_torrent.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023bb6.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23BB6 3556 bytes
font_01_sfnt_off00024939.bin
b0d29df35a2994eeba55534dae7916e1a22cb4869974c0bf088faf067ba40182		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24939 14776 bytes
font_02_sfnt_off000276b1.bin
a510c903ca106bc06d06627d537a28f9cc54fd82b58a1dcbc5302babbf266cd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x276B1 14640 bytes
font_03_sfnt_off0002a1e0.bin
9f7e0789badba0d7b957cab474570baac5791068172feda74a0f2e4890e49012		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A1E0 6248 bytes
font_04_sfnt_off0002b398.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B398 6084 bytes
font_05_sfnt_off0002c32d.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C32D 3752 bytes

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