Malicious PDF — malware analysis report

Static analysis result for SHA-256 fba018edbcbfe8b0…

MALICIOUS

PDF

8.0 KB
MD5: 40a936a3617c2ad05fee8c83e3c5c4e8 SHA-1: 24e94427e831200f530032beb7a6877cfe65ca34 SHA-256: fba018edbcbfe8b076bfe7149c459d17293e49b065d2a97158040d4675d32784
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'. ClamAV detection 'Pdf.Exploit.Agent-36063' confirms its malicious nature. The JavaScript is likely responsible for exploiting a vulnerability within the PDF reader to execute arbitrary code, leading to the observed malicious behavior. No specific family could be identified from the available evidence.

Heuristics 4

  • ClamAV: Pdf.Exploit.Agent-36063 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36063
  • 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
stream_000_off000001cb.js
eb39e2de4dbbc100de6d3e30aa43ff78fa075618862ba1ebba5151ea3a3b848d
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1CB 273 bytes
deobfuscated.js
11bf7658b6bb0abb13bb851fb0e1fa46e0166abb46ef1ff82c143cdfcec8c5cf
deobfuscated-js PDF JavaScript deobfuscation pass 23795 bytes