PDF malware analysis — malicious · aba262424fe0af1c

MALICIOUS

PDF

3.9 KB

MD5: 8742403fd1275bd5870f7e7e3494c8cc SHA-1: fcc31205d2a2393891324707f2b6ed84d5185b46 SHA-256: aba262424fe0af1cc33489b1ea009671c7465d0257c150a31fe582b6a7ba5697

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, PDF_EVAL, and PDF_FROMCHARCODE. The JavaScript streams, named 'javascript_obj111611_000.js' and 'javascript_obj111612_001.js', are suspicious due to obfuscation indicators. The use of eval() and String.fromCharCode suggests the script is designed to deobfuscate and execute malicious code, likely to download and run a second-stage payload. The document body content is unreadable and appears to be malformed or encrypted.

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` `00266e1fb4d5df53dc307c43ae5c71a93d03e7da2d7d851b1538222df57d1826`	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` `f82f7eec6dfc5fbf6fd557e4f04dbe858a6386d88029cd949699077c465098a5`	pdf-javascript-stream	PDF /JS object 111612 at offset 0x267	5524 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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