Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e437db2220dc960…

MALICIOUS

PDF

25.8 KB
MD5: 9a6f2cbaf6f231de9a1e21bb15af034b SHA-1: cd0423221d9cb4ae127335452f1a8636ae368092 SHA-256: 3e437db2220dc9609a9fc8a707ab23814e0d845f98f9ccc1b3462543439a55d9
106 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded script content, as indicated by the PDF_EMBEDDED_SCRIPT_PAYLOAD and PDF_XFA_SCRIPT heuristics. The ML classifier also strongly suggests maliciousness. The embedded file 'embedded_file_obj0001.bin' is likely the payload. The XFA form and embedded script suggest an attack pattern aimed at exploiting PDF vulnerabilities to execute arbitrary code.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • XFA form contains risky executable script high CVE related PDF_XFA_SCRIPT
    PDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
  • Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD
    PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
  • 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0001.bin
cccea643668882053a01de849ee1b04733dca04085529029b6edb5d799c61d7f
pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x53 2937 bytes