Malicious PDF — malware analysis report

Static analysis result for SHA-256 2561047101c36ebf…

MALICIOUS

PDF

354.6 KB Created: 2015-08-24 02:04:18 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 2f71cd8074caa2558480a910c9f8cbed SHA-1: 79a802f6c97a1e29cf581bd65e28b2eac3cdb333 SHA-256: 2561047101c36ebfe61822075dd1232c7ffd2f5b68b47381519326a976004c45
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 and a ClamAV detection identifying it as a dropper. The embedded URL points to a suspicious domain, indicating a likely attempt to lure the user to a malicious site. No scripts were extracted, but the PDF structure and the malicious URL strongly suggest a delivery mechanism for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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-9040182-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9040182-0
  • 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%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE+%D0%B5%D0%B6%D0%B8%D0%BA+%D1%82%D0%B0%D0%BD%D1%86%D1%83%D0%B5%D1%82&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/6//4693/4693649_obrazec__dogovora__arenduy_.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4694/4694741_skachat__dnevnik__pitaniya_.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4696/4696543_luntik__russkiy__yazuyk_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000544d5.bin
7f8fee636be5e495e449bab14d176ec01b66897326be8431425b43790d83f44c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x544D5 8252 bytes
font_01_sfnt_off00055d04.bin
e4236362587e005a60c61bcbf10edddf6e0a8abd176920f46d550134a3e34ccb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55D04 14660 bytes

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