PDF malware analysis — malicious · 30bc198e632fcd96

MALICIOUS

PDF

118.8 KB

MD5: 7158e0089c6ef4c781e7016f220c64bc SHA-1: f51d1f24373f826588a46cb8cffbbcba0a13006d SHA-256: 30bc198e632fcd963f0c573acec0232e50c27b94954caf0f3bd71dc633cd7f6c

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript, with high-confidence heuristics indicating the use of 'eval()' and a 'Large comment-padded JavaScript eval stager'. ClamAV also detected it as 'Pdf.Exploit.Agent-36086'. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, although the specific details are obfuscated. The presence of these indicators strongly suggests an exploit attempt within the PDF.

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` `89754e7dd382daa9110967ce2c2eba41553aa702d4e92a11f5ebde9a86d0fd7f`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	627622 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).

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