PDF malware analysis — malicious · d11de73cc4724323

MALICIOUS

PDF

3.9 KB

MD5: 6ae072ef660af24fe7147ec52d5bd191 SHA-1: f341fadfeb299aa6a233e91d99b8ffeb90794061 SHA-256: d11de73cc47243233b2ec7337fab03696ba04de8fd4ad0886750077d950e59c0

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript streams, with one stream exhibiting an eval() call and another using String.fromCharCode, indicating obfuscated code execution. The presence of these JavaScript actions strongly suggests the PDF is designed to download and execute a secondary payload. The extracted JavaScript files, 'javascript_obj111611_000.js' and 'javascript_obj111612_001.js', are the primary indicators of this malicious behavior.

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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111611_000.js` `a759913c366ff03bc7301bf55bb5f8c1a36a9b86b1a910c67c4afefe0b2a9671`	pdf-javascript-stream	PDF /JS object 111611 at offset 0x197	257 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj111612_001.js` `f4de21008e1afcc3187b44753ebe700bae6764c51c9084d476bbc6fb2ac26f1a`	pdf-javascript-stream	PDF /JS object 111612 at offset 0x267	5572 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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