Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0dfddb2db2678f6…

MALICIOUS

PDF

31.7 KB
MD5: 319cd099b3ac5b041197ff735ca2c83b SHA-1: 188ccded634bf52eba5a732c311762249bba8073 SHA-256: c0dfddb2db2678f6361c9c3986fcad077fd1cfc67cc87c3a5752a94ab45f4a52
186 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript and RichMedia (Flash) content, indicating an exploit attempt. Heuristics confirm JavaScript actions and embedded files, with ClamAV detecting it as 'Pdf.Exploit.Agent-35955'. The embedded Flash file, named 'bLpIqHqhc.swf', is likely the second-stage payload. The embedded JavaScript is responsible for loading and executing this Flash exploit.

Heuristics 7

  • ClamAV: Pdf.Exploit.Agent-35955 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-35955
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • RichMedia (Flash) high PDF_RICHMEDIA
    PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
  • 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.
  • 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.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0016.bin
c2b666a3ef4c191b77b78c037656e50477b8ba3d35fd61ae843a3a1f4d41c5c1		 pdf-embedded-file PDF EmbeddedFile object 16 at offset 0x148D 26774 bytes
Detection
ClamAV: Pdf.Exploit.Agent-35955
Obfuscation or payload: likely
Carved artifact entropy is 7.99, consistent with packed or encrypted content.
javascript_obj0006_000.js
42a31cac14c475ddb95c6374bb434cc37a0dbe348a7b6ebe6fc76ef2bcef785c		 pdf-javascript-stream PDF /JS object 6 at offset 0x144 3439 bytes

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