Malicious PDF — malware analysis report

Static analysis result for SHA-256 b63f2b1dff74fbb2…

MALICIOUS

PDF

262.0 KB Created: 2010-04-21 00:46:53 +08:00
MD5: b50a04c53444b1ae183b0b412ba69aa9 SHA-1: 8cf4ec1a3f27a648f497cfa18a45c17eef419b25 SHA-256: b63f2b1dff74fbb2aede9d66d5e71e89302122fe8a6270d6a80f6ff66e8689cc
126 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious Link

The file is identified as a malicious PDF by ClamAV (Pdf.Exploit.Agent-35956). Static analysis detected embedded JavaScript and RichMedia (Flash) content, indicating an attempt to exploit vulnerabilities within the PDF reader. The presence of these elements strongly suggests the PDF is designed to download and execute a secondary payload, a common attack vector for PDF-based malware.

Heuristics 7

  • ClamAV: Pdf.Exploit.Agent-35956 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-35956
  • RichMedia (Flash) high PDF_RICHMEDIA
    PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector (matched inside decoded stream)
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules. (matched inside decoded stream)
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules. (matched inside decoded stream)
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload (matched inside decoded stream)
  • PDF paints image(s) but contains no text operators info PDF_IMAGE_ONLY_LURE
    PDF has 2 image XObject(s) and the content stream contains no text-emitting operators (BT/ET, Tj, TJ, ', ") in either raw bytes or decompressed streams — this is the screenshot-as-PDF pattern used to bypass text-based scanners and to deliver instructions purely through rendered pixels. It is informational unless paired with invisible links or risky URI context.
  • 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://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/photoshop/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/tiff/1.0/
    • http://ns.adobe.com/exif/1.0/
    • http://ns.adobe.com/pdf/1.3/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objstm_0015_00.bin
0bea2f3f6742827130b057b701b07bdcb51c89b49c3509980c44a0392473f8fb		 pdf-objstm-decoded PDF /ObjStm 15 0 obj (inflated) 888 bytes

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