PDF malware analysis — malicious · 97514d5c171a4393

MALICIOUS

PDF

2.6 KB Created: 2008-12-17 23:30:58 UTC

MD5: 81a657b228ae53132c3bb246bd4c0ab8 SHA-1: 65304c8092e84229df346fa5a3be6216fad90c91 SHA-256: 97514d5c171a4393f32aca8e30ea26a18952c23da62954469c5514d106c94659

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript, which is heavily obfuscated and utilizes `eval()` and `String.fromCharCode()`. This indicates the script is designed to execute arbitrary code. The presence of a suspicious extracted JavaScript file further supports this. The primary function of the script appears to be downloading and executing a second-stage payload, though the exact URL or execution method is obfuscated within the script.

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. (matched inside decoded stream)
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_obj0006_000.js` `34c77e26fec8e4649c477a64ebf7bccf6b5e95a0827e5325ca47d3470febda2b`	pdf-javascript-stream	PDF /JS object 6 at offset 0xB5	9982 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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