PDF malware analysis — malicious · 1da28f2dbbdeefaa

MALICIOUS

PDF

2.9 KB

MD5: f5cf88ef69e71d6522461d9f0bc89467 SHA-1: b587f064c5564ca053911f88c7e8955bdfc3b198 SHA-256: 1da28f2dbbdeefaa53d971ee1e87bdccbf8b61544fed4987951728e64edfd313

116 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript, flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as 'Pdf.Dropper.Agent-7236489-0'. The embedded JavaScript is likely responsible for downloading and executing a secondary malicious payload, a common technique for PDF-based malware delivery. The ML classifier's strong positive output indicates a high likelihood of malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Dropper.Agent-7236489-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7236489-0
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_obj0009_000.js` `672dc9f4a045a4e74c3e8b9c4677c524cd351a28da76ca77fd6c6f78c2c96d41`	pdf-javascript-stream	PDF /JS object 9 at offset 0xD6	20097 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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