Malicious PDF — malware analysis report

Static analysis result for SHA-256 98a7463f54a74f8e…

MALICIOUS

PDF

185.1 KB Created: 2015-07-24 00:48:56 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: b0e03252f0587cf5fd9eb1a5d06bdf6d SHA-1: 0b7737f772c3232bcaa06eca956895322206243c SHA-256: 98a7463f54a74f8e1aa3846e1dfc76e2584aa1a80724e9747c18bb7c1f212197
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical alert for a malicious redirector link. The ML classifier also assigned a high probability of maliciousness. The embedded URL points to botcraftman.ru, which is identified as a known malicious redirector. No scripts were extracted, but the presence of a malicious link indicates a likely attempt to lure the user to a compromised 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-8926467-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8926467-0
  • 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=%D0%94%D0%B8%D0%BF%D0%BB%D0%BE%D0%BC+%D0%B4%D0%BB%D1%8F+%D0%BD%D0%B5%D0%B2%D0%B5%D1%81%D1%82%D1%8B+%D0%BD%D0%B0+%D0%B4%D0%B5%D0%B2%D0%B8%D1%87%D0%BD%D0%B8%D0%BA&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184852_skachat_kompas_3d_v13_besplatno_polnaya_versiya_askon.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185677_skachat_knigu_mein_kampf_na_russkom.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184511_skachat_klyuchi_dlya_kasperskogo_2015_na_god.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024198.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24198 3556 bytes
font_01_sfnt_off00024f1b.bin
9883ff7cd62248b60a1b187e5aa623979023702cc1814c5478d193a7d9443b03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24F1B 14744 bytes
font_02_sfnt_off00027cdf.bin
c33e6903d76079777c1b082a355654bfa5653b97afd40bc3e5344b34556d24bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27CDF 14468 bytes
font_03_sfnt_off0002a791.bin
4e0aba1f02f80656165c448b893106a6067a9817c454cf0b08d9ff6c16a7a3d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A791 6676 bytes
font_04_sfnt_off0002bab0.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BAB0 6084 bytes
font_05_sfnt_off0002ca45.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CA45 3752 bytes

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