Malicious PDF — malware analysis report

Static analysis result for SHA-256 9872086eb5f7f815…

MALICIOUS

PDF

3.4 KB Created: 2005-09-29 09:27:34 UTC Authoring application: Adobe PDF Library 8.0
MD5: b11019503fabf36656e2f0f58727acd0 SHA-1: 5c223078b1693ff6727d02d82ec25314e18e8247 SHA-256: 9872086eb5f7f8154a2e58f88fe6c1d752a63c1df6e2f755a62e25f8d24ff367
160 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript and an embedded file, triggering heuristics for JavaScript actions and embedded files. A critical heuristic identified the CVE-2010-0188 exploit targeting Adobe Reader's LibTIFF component via an XFA image. Additionally, ClamAV detected a Win.Trojan.E-51 signature on an extracted artifact. The combination of these findings strongly suggests the PDF is designed to exploit this vulnerability and deliver a trojan.

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
c4defa95089440d472b22230319ff78c7358d88931e7558086fe40fe9beda660
pdf-embedded-file PDF EmbeddedFile object 4 at offset 0x1C6 35879 bytes
Detection
ClamAV: Win.Trojan.E-51
Obfuscation or payload: unlikely