PDF malware analysis — malicious · c0aee9d17dafe785

MALICIOUS

PDF

74.4 KB Created: 2010-03-09 04:18:22 Authoring application: Ptz0JEXUZgH (via aLCu9hiHPI2Xvy)

MD5: 2fb9defc6d1aec1cfb6399abfde841f6 SHA-1: efec8ed825da60c22eab4d5dbe946cd194977478 SHA-256: c0aee9d17dafe785a27ed04d2c4ac1d29d2201b51d50f5ce704d02036ca5974b

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The high-severity PDF_EVAL firing suggests the use of eval(), a common technique for executing obfuscated code. The extracted artifact 'javascript_obj0007_000.js' is also flagged as suspicious due to script obfuscation. This JavaScript is likely designed to download and execute a second-stage payload.

Heuristics 5

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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape 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.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `07831d0a4e3d5ebf8bf02fad3e7c7b558ca1223b49a7f6f7e5177a1876cc67c0`	pdf-javascript-stream	PDF /JS object 7 at offset 0x241	74917 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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