Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bd9883ef5d2a768…

MALICIOUS

PDF

185.3 KB Created: 2015-07-24 08:53:57 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 0bc85b2341fabd1d199ca79c9fe19a44 SHA-1: 21d87e4eec4c9975bbb99f8ef2b6a50edb6f8dcd SHA-256: 4bd9883ef5d2a7684241776d607f8b153f0a8c023a0953791b7f7caef74c28f0
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical alert for a link to known malicious redirector infrastructure. The primary malicious indicator is the embedded URL pointing to botcraftman.ru, which is likely used to deliver a secondary payload or redirect to a phishing site. No scripts were extracted, but the PDF structure and the malicious link strongly suggest a delivery mechanism for further compromise.

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-7494006-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7494006-0
  • 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%BF%D1%80%D0%BE%D0%B3%D1%80%D0%B0%D0%BC%D0%BC%D0%B0+%D0%BE%D0%BB%D0%B8%D0%BC%D0%BF+%D0%BE%D0%BA%D1%81+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4189/4189135_chilkatzip2dll_nalogoplatelschik.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185638_avtokad_14_skachat_besplatno_russkaya_versiya_torrent.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4187/4187886_skachat_gta_4_na_psp_cherez_torrent.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002430c.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2430C 3556 bytes
font_01_sfnt_off0002508f.bin
12acb82a09d7e0d7f9729c02e6e9371940bcce2e9dd2a3ce8f4de5601dab8b9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2508F 14660 bytes
font_02_sfnt_off00027e23.bin
c33e6903d76079777c1b082a355654bfa5653b97afd40bc3e5344b34556d24bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27E23 14468 bytes
font_03_sfnt_off0002a8d5.bin
adf46c94324d5150595e3164e640c33d5db3b963099c66692e30c15c8b908e52		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A8D5 6580 bytes
font_04_sfnt_off0002bb94.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BB94 6084 bytes
font_05_sfnt_off0002cb29.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CB29 3752 bytes

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