PDF malware analysis — malicious · 1a1c6add2ce2134f

MALICIOUS

PDF

6.6 KB

MD5: f7c1977d8a055c460ee0b25e5bfcf6c5 SHA-1: db9534a8306d42012384c5d0a6bf05866e62e20c SHA-256: 1a1c6add2ce2134f45f9657a09ccc502501881c366f11019101163fe4dea89ef

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 critical ClamAV detection for 'Pdf.Exploit.Agent-36086'. Static analysis identified embedded JavaScript, including the use of String.fromCharCode, suggesting obfuscation to hide malicious code. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves exploiting vulnerabilities within the PDF reader via embedded JavaScript to achieve initial compromise.

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` `efc4de1e6fc4ecc3ae2b358c1349d3682cbe8949138c71d641a9e83dbae9d4e7`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	137518 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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