Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdb8ab6faf484ef5…

MALICIOUS

PDF

3.4 KB Created: 2005-09-29 09:27:34 UTC Authoring application: Adobe PDF Library 8.0
MD5: 0f54e269e13808ab4b88be5447b8558c SHA-1: 27311963318814d76767ee2bc0760ca3660545b6 SHA-256: fdb8ab6faf484ef58bcfd08e5267675e1456a7cb6878ae39f42bb96baea59d07
160 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.001 PowerShell

The file is a PDF document that contains embedded JavaScript and an embedded file. Heuristics indicate a critical vulnerability, CVE-2010-0188, which is an Adobe Reader LibTIFF XFA image exploit. This exploit likely allows for the execution of arbitrary code, as suggested by the JavaScript action and embedded file. The embedded file is 35879 bytes in size and is likely the second-stage payload.

Heuristics 7

  • Adobe Reader LibTIFF XFA image exploit — CVE-2010-0188 critical CVE likely CVE_2010_0188
    PDF contains XFA image data with an inline crafted TIFF payload and shellcode/delivery markers. This is the data-bound variant of the CVE-2010-0188 Adobe Reader LibTIFF/XFA exploit shape.
  • ClamAV: Pdf.Exploit.Agent-36078 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36078
  • 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
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • AcroForm button with action trigger low PDF_ACROFORM_BUTTON
    PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0004.bin
f87ef892c90f75749b7fd47803a295ed80770732fd5c4c1a5c323a7a5be98fd1		 pdf-embedded-file PDF EmbeddedFile object 4 at offset 0x1C6 35879 bytes

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