Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5a92b4ee0b52784…

MALICIOUS

PDF

194.8 KB Created: 2015-08-08 09:50:03 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: ea17f1cc855e7795d68da06edd10f61d SHA-1: 2e23db24b256ba121caa284de01a78a81a41c075 SHA-256: f5a92b4ee0b5278425c868adf5cc9bd30fbdbf5a989ca9ecb70920cb16a6f2a0
152 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The ML classifier also flagged it with high confidence. ClamAV detected it as Pdf.Dropper.Agent-8790440-0. The primary malicious IOC is the URL http://botcraftman.ru/, which is likely used to serve a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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-8790440-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8790440-0
  • 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%BA%D0%B0%D1%80%D1%82%D0%B0+%D1%80%D1%8B%D0%B1%D0%B8%D0%BD%D1%81%D0%BA%D0%B0+%D1%81+%D1%83%D0%BB%D0%B8%D1%86%D0%B0%D0%BC%D0%B8+%D0%B8+%D0%BD%D0%BE%D0%BC%D0%B5%D1%80%D0%B0%D0%BC%D0%B8+%D0%B4%D0%BE%D0%BC%D0%BE%D0%B2+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/6//4383/4383817_saminside_instrukciya.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4384/4384227_skachat_temuy_dlya_iriver_s100.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4383/4383777_skachat_komiksuy_na_yelektronnuyu_knigu.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00026678.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x26678 3556 bytes
font_01_sfnt_off000273fb.bin
e3a38383c5506370d633d753ec68697a1a953198dbdf9aa0e601aa0e4994d1a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x273FB 14936 bytes
font_02_sfnt_off0002a267.bin
c33e6903d76079777c1b082a355654bfa5653b97afd40bc3e5344b34556d24bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A267 14468 bytes
font_03_sfnt_off0002cd19.bin
cd22000d9d160f815a4284d28b8d4fc1602d12f4822d00a64aa57fbf7d414aee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CD19 7056 bytes
font_04_sfnt_off0002e192.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E192 6084 bytes
font_05_sfnt_off0002f127.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F127 3752 bytes

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