PDF malware analysis — malicious · 23ba6cadfa1d8f69

MALICIOUS

PDF

3.9 KB

MD5: 8599fac4b7dd1d30f11b8db26f28c34b SHA-1: 8126b27a9ef253444fd2e3255d4c6aaa629c0d04 SHA-256: 23ba6cadfa1d8f69aebe5c7c946bac35657ed2a2dacacc36f52c5ece489db9b3

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

This PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, PDF_EVAL, and PDF_FROMCHARCODE. The JavaScript streams, particularly javascript_obj111612_001.js, appear to be obfuscated and utilize eval() and String.fromCharCode, suggesting an attempt to hide malicious functionality. The primary intent of the script is likely to download and execute a second-stage payload, a common technique for initial access.

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` `c20e214ed03ba7a3ea18dc2c298dbf30d83ab3c683b50f57f3f7e06b4b5e608c`	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` `34ab3f36f53b00d3fa9b1bf99f7d7bd88893ef6fab23f112daad996221f5162e`	pdf-javascript-stream	PDF /JS object 111612 at offset 0x266	5589 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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