Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccb78c5659fa93d8…

MALICIOUS

PDF

4.0 KB
MD5: 57ac37480a1843b67ccd8297dc151cec SHA-1: 68c51d505d0ccb697aafc76307b8c48ab7db47bd SHA-256: ccb78c5659fa93d8d88f1d27ec5459677bda7b27b163f5ac7510801a3d5dcf9f
84 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 ClamAV detection 'Pdf.Exploit.Agent-14128' strongly suggests this is a known exploit. The embedded JavaScript is likely responsible for executing a malicious payload, although the specific actions are not detailed in the provided evidence. Due to the lack of specific IOCs and the obfuscated nature of the JavaScript, the family is unknown.

Heuristics 4

  • ClamAV: Pdf.Exploit.Agent-14128 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-14128
  • 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_obj0007_000.js
11b03694c4e705ab29873cc5e2c55342ee498b376ac2dc5f05ce17018ef44c38
pdf-javascript-stream PDF /JS object 7 at offset 0x1A4 264 bytes
deobfuscated.js
9b1b66d97e19a76801702f357fc4c1369cf3cb6a425638d595ac3d3de8aab9e1
deobfuscated-js PDF JavaScript deobfuscation pass 11566 bytes