Malicious PDF — malware analysis report

Static analysis result for SHA-256 a85c27df42904bb7…

MALICIOUS

PDF

3.3 KB Created: 2005-09-29 09:27:34 UTC Authoring application: Adobe PDF Library 8.0
MD5: 54d9913f6d1c9ee664c27f7cc5e86292 SHA-1: f00a9bfee7e20f523ec08933e41f2db96c85bcd0 SHA-256: a85c27df42904bb7c3e085e1c2e339b730cd64833a77f0ce0ea2f20490993f94
100 Risk Score

Malware Insights

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

The PDF file contains an embedded JavaScript stream and an XFA form, which are commonly used to deliver exploits. Specifically, the critical heuristic firing indicates a match for CVE-2010-0188, an exploit targeting Adobe Reader's LibTIFF component via an XFA image. This exploit allows for arbitrary code execution, likely to download and run a secondary payload. No specific malware family was identified.

Heuristics 6

  • 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.
  • 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
dd3d6f7a03f23404650b7b9fc1c345cd341748db82b665b119090c5cb94f6539
pdf-embedded-file PDF EmbeddedFile object 4 at offset 0x1C6 35879 bytes