Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7228fedf794d24a…

MALICIOUS

PDF

59.1 KB
MD5: 9651404bed89e7623c59d7a630180257 SHA-1: 65f5cc02b407a56901ad31eb46999ad4fdea285e SHA-256: d7228fedf794d24a88659febe82d21c598da2e3c574f81161f769469d3beadaa
184 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious File T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains embedded JavaScript and a Flash object, indicating an attempt to exploit vulnerabilities. The ClamAV detection 'Pdf.Exploit.Agent-35955' strongly suggests malicious intent. The embedded JavaScript likely facilitates the loading and execution of the Flash object, which is a common technique for delivering further malicious payloads.

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
  • 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://code.flashdynamix.com/AES/aes-decrypt.php
    • http://code.flashdynamix.com/AES/aes-encrypt.php
    • http://adobe.com/AS3/2006/builtin

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
WpuVlEGnF.swf
bf9dea6ff47dfb47c2f51b1fa9a09527dfe5e95399ccb2d043ba956b197360c9		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x1D2E 52647 bytes
Detection
ClamAV: Pdf.Exploit.Agent-35955
Obfuscation or payload: unlikely
javascript_obj0006_000.js
984b40e2ed94b7a2bbed2142c231a5a06b0a5896ba4ec2393246dcc1bf01a05c		 pdf-javascript-stream PDF /JS object 6 at offset 0x137 6254 bytes

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