PDF malware analysis — malicious · e0c282cd97598464

MALICIOUS

PDF

14.5 KB

MD5: 81f5813dff457ce818de8c97e78a0546 SHA-1: 7519a5aa5d63eae27e1fd57325286d069bf5d738 SHA-256: e0c282cd9759846476ecf560a7c73bb396177ad8e5d38cc738e641a074426684

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell T1204.002 Malicious File: User Execution: Malicious File

This PDF file was flagged by ClamAV as Pdf.Exploit.Dropped-94, indicating it contains an exploit. Static analysis revealed embedded JavaScript with an eval() call and String.fromCharCode usage, typical of obfuscated malicious scripts. The JavaScript is likely designed to download and execute a secondary payload, as suggested by the 'Suspicious extracted artifact' heuristic. No specific family could be identified, but the exploit delivery mechanism is clear.

Heuristics 6

ClamAV: Pdf.Exploit.Dropped-94 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Dropped-94
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.
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0076_000.js` `c28effae366bd4b2a63fe29aea090a07947ae4e73aa9efc1cf87e16e006e7288`	pdf-javascript-stream	PDF /JS object 76 at offset 0x3899	144 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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