Malicious PDF — malware analysis report

Static analysis result for SHA-256 4324bc71ada3a195…

MALICIOUS

PDF

12.4 KB
MD5: 613f1eaa183d8f5a1641fd24106b8674 SHA-1: 8f4c557d0e47cdd191dbe7415d88e7366b525341 SHA-256: 4324bc71ada3a195e38fd200ee14c5e089c9b06361d0a76e1514e787338b6852
116 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The 'PDF_METADATA_EVAL_STAGER' heuristic suggests that the JavaScript is used to decode and execute further code, a common technique for downloading and running second-stage malware. ClamAV detection 'Pdf.Exploit.Dropped-94' further confirms its malicious nature. The document body is minimal and does not provide specific lures.

Heuristics 4

  • ClamAV: Pdf.Exploit.Dropped-94 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-94
  • PDF metadata JavaScript eval stager high PDF_METADATA_EVAL_STAGER
    PDF JavaScript reads document metadata fields such as title, subject, or producer, decodes character data with parseInt/String.fromCharCode style helpers, and evals the recovered stage. This is a high-signal exploit-kit staging pattern.
  • 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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0076_000.js
14a52c295e7fd309c01314a0ac041f9448d17b6569f08de673a15393f1e52ff5
pdf-javascript-stream PDF /JS object 76 at offset 0x2F7E 331 bytes