PDF malware analysis — malicious · 7fa09eff44df4d3b

MALICIOUS

PDF

15.7 KB

MD5: 669e23225d69d569fcdc2203b44626b4 SHA-1: c02f3dab96e028ffb77d8f382e7a56ceefcef202 SHA-256: 7fa09eff44df4d3b4b1139e9fedb027b13e6d7587208d84d5825303e4f8bf536

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell T1204.002 Malicious File: Exploitation by User Interaction

The PDF file contains embedded JavaScript, including a large, obfuscated stager that utilizes eval() and String.fromCharCode(). This pattern is indicative of an exploit attempting to download and execute a secondary payload. The ClamAV detection 'Pdf.Exploit.Agent-36086' further supports this assessment. No specific family could be identified due to the generic nature of the exploit.

Heuristics 7

ClamAV: Pdf.Exploit.Agent-36086 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36086
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
Large comment-padded JavaScript eval stager high PDF_JS_LARGE_COMMENT_PADDED_EVAL

PDF JavaScript contains a very large stream padded with long random-looking block comments around String.fromCharCode and eval. This is an exploit-kit obfuscation shape used to bury a decoder and recovered stage inside noise, not normal PDF form automation.
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `211d349516061c7b8b37e8e9888634526b0098e937ba62be976d20ecb71b4c2c`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	424951 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 42 long base64-like blob(s).

Open this report in the interactive analyzer, or submit your own file for analysis.