PDF malware analysis — malicious · 534351e3cf82e7a9

MALICIOUS

PDF

666 B

MD5: b591ff7d9d59cd8fcae506290c07e4e0 SHA-1: cc57bfb70f36bdf909c68aa2878b20274be8a9a5 SHA-256: 534351e3cf82e7a9e2709083233bdb815399bfa73d12ff082767d4381b77cf62

86 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream uses String.fromCharCode, suggesting obfuscation. ClamAV identified the file as Pdf.Dropper.Agent-7422121-0, a known dropper. The embedded JavaScript likely downloads and executes a second-stage payload, which is a common dropper behavior.

Heuristics 5

ClamAV: Pdf.Dropper.Agent-7422121-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7422121-0
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_obj111611_000.js` `94b011b8dc83ccbe24dbb4cb2bb8dd875c04540173585b54211038a7263af994`	pdf-javascript-stream	PDF /JS object 111611 at offset 0x1B9	111 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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