Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f2949d4d1788af2…

MALICIOUS

PDF

11.5 KB Created: 2007-12-35 21:45:26 Authoring application: Adobe
MD5: 833ffaeeb25c49d443f6b40f8ae7cc55 SHA-1: bac6ddf1eae80f35f7b07c81e7c9761675cf83bd SHA-256: 2f2949d4d1788af216b3a8447199a1610d29c334e44f310e5e658c0073b29100
118 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of a PDF_EVAL heuristic firing suggests that the JavaScript is using eval() to execute obfuscated code. ClamAV detection as 'Pdf.Dropper.Agent-7685769-0' further confirms its malicious nature. The primary function appears to be downloading and executing a second-stage payload, as suggested by the dropper classification and the use of obfuscated JavaScript.

Heuristics 5

  • ClamAV: Pdf.Dropper.Agent-7685769-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7685769-0
  • 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.
  • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0032_000.js
8783772f0249804f22ae842046ae2b438a154882d36ce11cb545e9e9cb718be4		 pdf-javascript-stream PDF /JS object 32 at offset 0x348 705783 bytes
javascript_obj0034_001.js
443e0cc5892568edc532cb6f6d75959bd74925c28415c789a9b8cdea94fd0a1f		 pdf-javascript-stream PDF /JS object 34 at offset 0x2B9C 323 bytes
javascript_obj0036_002.js
d35666f2e142fa0a781cc810ed457f02794f96867ac25bfac2a189e776337636		 pdf-javascript-stream PDF /JS object 36 at offset 0x75 416 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).

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