Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0af74cccfc2d49e…

MALICIOUS

PDF

51.6 KB Created: 2009-11-13 15:54:24 +03:00 Authoring application: tendChunk (via 20b5e1cf8694af7a3c1ba4a87f073021)
MD5: ed0b62e924312ef2397fcff24159e0b6 SHA-1: 143f56688dff3c9c9107c8bb20ea0d798a813bff SHA-256: c0af74cccfc2d49ed94b5bb5aa5f3db6e997295d474d62c02eac81410828f2be
156 Risk Score

Malware Insights

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

This PDF sample was flagged by ClamAV as Pdf.Dropper.Agent-1828902, indicating it's a dropper. Static analysis revealed embedded JavaScript streams, including one that utilizes an `eval()` call. This suggests the script is designed to execute arbitrary code, likely to download and run a second-stage payload. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Dropper.Agent-1828902 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-1828902
  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
  • 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.
  • Optional Content Group with action trigger low PDF_OPTIONAL_CONTENT
    Optional Content Group (layer) co-occurs with an action trigger — content can be selectively hidden from viewers or scanners while the action still fires on open

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0021_000.js
d96ed1dbc68728eab216dfce70a983a57a11bc51e6004666845fec9518aaedfc		 pdf-javascript-stream PDF /JS object 21 at offset 0x372C 4096 bytes
javascript_obj0022_001.js
a1e05f88ebb8c67f57fe99c54bd5bc083e511a6ad1a7793c9747a547b405e3b5		 pdf-javascript-stream PDF /JS object 22 at offset 0xC7A9 41 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.