PDF malware analysis — malicious · bae63e14375c32bd

MALICIOUS

PDF

118.7 KB

MD5: f70ba45ce99873d9434436743ed4d8a8 SHA-1: 70560e5b2eb26dc76b6e23bd582b677650f2c879 SHA-256: bae63e14375c32bd9bfd85ca1a7ccbed502f818cb78cd6a4161add2304573a8d

196 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.001 Spearphishing Attachment

This PDF sample was flagged by ClamAV as Pdf.Exploit.Agent-36086. Static analysis revealed multiple high-severity heuristics related to JavaScript execution, including eval() calls and a large comment-padded JavaScript eval stager. The ML classifier also strongly indicated maliciousness. The embedded JavaScript, likely responsible for the exploit, is heavily obfuscated but appears designed to download and execute a second-stage payload. The presence of JavaScript actions and embedded JS streams points to a common delivery mechanism for malicious documents.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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` `a58bcc5f76029800dfd717930b380f78e14a503645edefc1cdc21a268499c4e9`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	627883 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.