PDF malware analysis — malicious · ce383e13e1cf0ac4

MALICIOUS

PDF

15.7 KB

MD5: 58ca8b67fbc9908cda17ac6340e2b724 SHA-1: 19d2412562c76e4435e45a2d9e41f4d773ce1cbd SHA-256: ce383e13e1cf0ac4655aed674b48f9010715b9944531296ca91b8d26c6c3b71b

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF document contains embedded JavaScript, identified by multiple heuristics including 'PDF_JAVASCRIPT', 'PDF_JS', and a 'PDF_JS_LARGE_COMMENT_PADDED_EVAL' stager. This stager likely downloads and executes a second-stage payload, as indicated by the 'eval()' call and the 'unknown_exploit_score'. The ClamAV detection 'Pdf.Exploit.Agent-36086' further confirms its malicious nature. The document body was unreadable, preventing a more specific assessment of the lure.

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` `5a26b4d4112556e466ddd87785dc6d6e0767c6c689c879aa7a57d05bc9995d45`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	425812 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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