Pdf.Dropper.Agent — PDF malware analysis

Static analysis result for SHA-256 ecc7504d0aba0948…

MALICIOUS

PDF

5.5 KB
MD5: 43e16c46a7ee9d2ce68c73561e0e0578 SHA-1: 48435e547769d179661a0c9799e6ed84ca94d6eb SHA-256: ecc7504d0aba0948c8b58893259f38d4ab5724a1e01adae9fa47803fb04c6d82
84 Risk Score

Malware Insights

Pdf.Dropper.Agent · confidence 95%

MITRE ATT&CK
T1204.002 Malicious File: Malicious File

The critical ClamAV heuristic 'Pdf.Dropper.Agent-7320660-0' strongly indicates this PDF is a dropper. Low-severity heuristics for PDF JavaScript and embedded JS streams confirm the presence of executable code within the PDF. The deobfuscated JavaScript, though large, likely contains logic to fetch and execute a secondary payload, which is a common dropper behavior. The document body is unreadable, but the technical indicators are sufficient.

Heuristics 4

  • ClamAV: Pdf.Dropper.Agent-7320660-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7320660-0
  • 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.
  • syncAnnotScan annotation-staging primitive low PDF_FOXIT_SYNCANNOTSCAN
    PDF JavaScript calls syncAnnotScan() — a no-op annotation-enumeration primitive used by exploit-kit JavaScript to stage payload reads from annotation /Subject fields before eval(). Not a vulnerable sink itself; rarely seen in legitimate PDFs. (matched in decompressed stream)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0005_000.js
a3319192cac6d4dc4eeb6af2d736b0ffec979b23116a003bc7c23382761c32a5
pdf-javascript-stream PDF /JS object 5 at offset 0x148 733 bytes
deobfuscated.js
b5c0e74e24557d1350d33376f6d4468b895ebf5b382572254732dd649f66c936
deobfuscated-js PDF JavaScript deobfuscation pass 8348 bytes