Malicious PDF — malware analysis report

Static analysis result for SHA-256 8542eb5160111df4…

MALICIOUS

PDF

183.8 KB Created: 2015-08-08 09:29:01 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 146db86854210735486f5166cd3e7128 SHA-1: fba5c0d70269c1f6e4da34bb9ea8296aec0aaa7f SHA-256: 8542eb5160111df4b48c7db3258be7fd1a771473e6c55de8c73b54d6099fb325
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, indicating it is designed to lure users to a harmful site. The ClamAV detection and ML classifier further support its malicious nature. The primary IOC is the malicious URL, which is likely used to download and execute a second-stage payload.

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-7621166-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7621166-0
  • 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%D1%83%D0%B1%D0%B0%D0%BD%D0%BE%D0%B2%D0%B5%D0%B4%D0%B5%D0%BD%D0%B8%D0%B5+%D0%B7%D0%B0%D0%B9%D1%86%D0%B5%D0%B2+%D0%B0%D0%B0&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/6//4383/4383744_skachat_besplatno_detskie_klipuy_iz_peredachi_baby_time.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4383/4383758_cash_viewer_skachat.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4383/4383807_lenovo_v570e_otzuyvuy.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023c83.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23C83 3556 bytes
font_01_sfnt_off00024a06.bin
9fd7d7a9970b24ef46ed9190dc62c6dd2c05cb1c81788694d31e64c6d29b3b98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24A06 15120 bytes
font_02_sfnt_off00027861.bin
dde8cb3db78f49492d397de1013a074ab9c596bc0508faa33f94bd64189db0ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27861 14468 bytes
font_03_sfnt_off0002a314.bin
e0c3ded6ec52924a20f975bab1fc02dc53ba3f20f5563b5dbd8337e8faf06097		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A314 6480 bytes
font_04_sfnt_off0002b558.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B558 6084 bytes
font_05_sfnt_off0002c4ed.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C4ED 3752 bytes

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