Pdf.Dropper.Agent-7216661-0 PDF malware analysis — malicious · b5c781419c76c4f6

MALICIOUS

PDF

2.0 KB

MD5: 1115f986de2fe63a81f738112ed339e0 SHA-1: 3a5b6507636920f7ad232b998766bf39dbbfc96b SHA-256: b5c781419c76c4f65192f6babc1ce4c0781653e6720eaafca97e129aca17c3a0

196 Risk Score

Malware Insights

Pdf.Dropper.Agent-7216661-0 · confidence 95%

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

This PDF file was flagged as malicious by ClamAV and a machine learning classifier. It contains embedded JavaScript with multiple obfuscation techniques, including eval() and unescape() calls, and String.fromCharCode. The JavaScript is likely responsible for downloading and executing a second-stage payload, as indicated by the 'Pdf.Dropper.Agent-7216661-0' detection name and the presence of an extracted JavaScript file. The ML classifier output of 0.999992 further supports the malicious nature of the file.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 7

ClamAV: Pdf.Dropper.Agent-7216661-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7216661-0
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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` `9864171cc4152f5d3e5671809dd40cebe1cf9319d0b8bfb0abd003cff50482db`	pdf-javascript-stream	PDF /JS object 111611 at offset 0x6F6	332 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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