PDF malware analysis — malicious · 981e634b881587e7

MALICIOUS

PDF

6.6 KB

MD5: ee96f3dc6ad3e0dc46478ca37c80a901 SHA-1: 54b9708300685c9bf2bc5abd5d3ee4eaeb76ae8a SHA-256: 981e634b881587e7ecd9be2e14a38b49c2a278975522e42f685189bdcef622f2

116 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection for 'Pdf.Exploit.Agent-36086'. It contains embedded JavaScript, which is often used to exploit vulnerabilities or download further malicious content. The presence of a long encoded blob and script obfuscation indicators in the extracted JavaScript further supports a malicious intent, likely involving the execution of a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Exploit.Agent-36086 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36086
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` `cb2d6356c7097142603400355de03af53622c0846fbbc63e6c27a9d0a5e68fd7`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	137519 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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