PDF malware analysis — malicious · d18b44762077979a

MALICIOUS

PDF

2.7 KB

MD5: 69a8c3f0ede64806d2827a7357ea09c6 SHA-1: 29e466a41855776e3c8fbe9de12826f7321ae214 SHA-256: d18b44762077979a20b12196bec4dc747182e4449a47f219a365ebd713a224d9

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

This PDF file contains embedded JavaScript, which is a common technique for delivering malicious payloads. The heuristics indicate the presence of JavaScript actions, embedded JS streams, and specifically an eval() call, suggesting the script is likely obfuscated and designed to execute arbitrary code. The String.fromCharCode() usage further supports the obfuscation. While no specific family is identified, the overall pattern points to a downloader or exploit loader.

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` `b2a48cd4e42250aeff4d574e4c9014cece24e6f4a31dceb091aa866542f23b61`	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` `14a3501b151076c9efbad17581fcc9ed8b2abece42e78151e24a469c6035be5f`	pdf-javascript-stream	PDF /JS object 111612 at offset 0x266	3329 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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