PDF malware analysis — malicious · 947c6342b2f3feb8

MALICIOUS

PDF

118.7 KB

MD5: ed854b4c4b07a6079c995e928e6232ed SHA-1: 32d3641d4f9d8b65071949e747c04921c267e949 SHA-256: 947c6342b2f3feb80300d0282fdff1eb0f0d7a2f05536797ddccda2a91159f00

196 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF contains embedded JavaScript, including a high-severity heuristic firing for a 'Large comment-padded JavaScript eval stager'. This indicates the script is designed to obfuscate and execute malicious code. The ML classifier and ClamAV detection strongly suggest this is a malicious exploit, likely attempting to download and execute a second-stage payload. The presence of JavaScript actions and eval() calls points to T1059.001 (PowerShell) or similar scripting techniques, and the overall nature of the PDF suggests T1566.002 (Spearphishing Attachment) as the delivery vector.

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` `a228a8dfa1cadc0fa7d0dd82c336daced83f16a9a4dd38064c75f21d67acc31b`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	627773 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.