PDF malware analysis — malicious · e8590b28657b2656

MALICIOUS

PDF

4.0 KB

MD5: 6cb7631c26b1b535fdae4c34e8997c0b SHA-1: 644046ef89cf4abac083065adf7ac90cd7c7e9e3 SHA-256: e8590b28657b265677acf6fc8a9befb3be66dfaf00be97f05da01236b3ced3e2

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 presence of PDF_EVAL and PDF_FROMCHARCODE suggests the JavaScript is obfuscated and likely uses eval() to execute arbitrary code. The extracted JavaScript files, 'javascript_obj111611_000.js' and 'javascript_obj111612_001.js', are suspicious due to script obfuscation. The overall behavior points to a downloader or dropper mechanism, aiming to fetch and execute further malicious content.

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` `f5916c73229d16e0a37263855065d45ca91d25695041bd525084ca012a45d704`	pdf-javascript-stream	PDF /JS object 111611 at offset 0x197	256 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj111612_001.js` `6726e289b811ae8df1a17b144b6c5729353db0effea8c684aa8e5f5c85ad6ae3`	pdf-javascript-stream	PDF /JS object 111612 at offset 0x264	5544 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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