Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6c8e6d801200027…

MALICIOUS

PDF

3.4 KB Created: 2005-09-29 09:27:34 UTC Authoring application: Adobe PDF Library 8.0
MD5: 4d08355a57eaa991ea2e0dc2c7637480 SHA-1: 495cf44a8180e96c279d9c88f2f464996f54de21 SHA-256: d6c8e6d801200027fdadf7e99611a2190f47986024f40b58d50fc8d4ddc74273
160 Risk Score

Malware Insights

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

The PDF file exploits the CVE-2010-0188 vulnerability in Adobe Reader's handling of XFA forms and TIFF images. This exploit is designed to execute a malicious payload, as indicated by the ClamAV detection of 'Win.Trojan.E-51' on an extracted artifact. The presence of JavaScript actions and embedded JS streams further supports the malicious intent.

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 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.
  • 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
e9ae42630f1aaa532b066d8d4f8df1024c6ee2e7836b35bb014e80f41c33658b		 pdf-embedded-file PDF EmbeddedFile object 4 at offset 0x1C6 35879 bytes
Detection
ClamAV: Win.Trojan.E-51
Obfuscation or payload: unlikely

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