Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9fe97398504f37e…

MALICIOUS

PDF

10.9 KB Created: 2009-08-25 18:21:22 Authoring application: iZIvQgdsPFGkcHPakEz (via CmeAthakaUytqz)
MD5: 29a7ef98cd22e9b0e28c0401f9d51a51 SHA-1: 9978ac7fb82e1023dc1408857bcaa8125fb44f67 SHA-256: d9fe97398504f37e690c66dc2721ae459aa95fe59f56c08f32a505677ecdad6a
110 Risk Score

Malware Insights

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

The file is a PDF containing embedded JavaScript, as indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The ML classifier and ClamAV detection strongly suggest malicious intent, specifically identifying it as 'Pdf.Exploit.Agent-35572'. The embedded JavaScript, named 'javascript_obj0007_000.js', is likely responsible for exploiting a vulnerability within the PDF reader to download and execute a secondary payload. The document body content is heavily obfuscated and does not provide clear user-facing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • ClamAV: Pdf.Exploit.Agent-35572 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-35572
  • 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.
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0007_000.js
4588afc3353bb4a5f6da0dae06b283df3777ef0ff342395900f95aad80ab7f5c
pdf-javascript-stream PDF /JS object 7 at offset 0x563 9052 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).