PDF malware analysis — malicious · ea78311edcced9d9

MALICIOUS

PDF

17.6 KB Created: 2010-03-16 06:18:44 Authoring application: TIj4Y (via I0EZshSC)

MD5: 136603c3f93e67681b905a63f5ac5107 SHA-1: e14c6dab0a6d29fc2a997c8c234b9eeb79230a91 SHA-256: ea78311edcced9d98f4e22e33abf5678961beb33ee814cc7a6579f73a6dff2c4

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The PDF_EVAL heuristic firing suggests that the JavaScript is obfuscated and uses eval() to execute code. The extracted artifact javascript_obj0007_000.js is likely responsible for downloading and executing a secondary payload. The confidence is moderate due to the obfuscation making a definitive analysis of the script's exact actions difficult.

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` `eac4f6b29889dbcc2acd154b80d9a8fbc9ea50a83d2618b7b67b1e1d8f41ed4f`	pdf-javascript-stream	PDF /JS object 7 at offset 0x241	16783 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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