Pdf.Dropper.Agent-7685819-0 PDF malware analysis — malicious · a55a28b8bc938758

MALICIOUS

PDF

4.1 KB

MD5: 69e94522fd5c474301defc3a89d7460e SHA-1: 1c478a759d562a26302ef3d302a9a7086042c6f6 SHA-256: a55a28b8bc93875830fe58b1fc75c362e3efc89b3ab23fc8b94138b0c448d542

126 Risk Score

Malware Insights

Pdf.Dropper.Agent-7685819-0 · confidence 95%

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The critical PDF_EVAL and PDF_FROMCHARCODE firings suggest that the JavaScript is obfuscated and likely executes arbitrary code. The ClamAV detection name 'Pdf.Dropper.Agent-7685819-0' further supports its role as a dropper. The extracted JavaScript files, 'acroform_b64_00.js' and 'javascript_obj0013_001.js', are the primary artifacts responsible for this malicious behavior.

Heuristics 6

ClamAV: Pdf.Dropper.Agent-7685819-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7685819-0
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `053069dac27aa05a4ccd961d6e904643b0d753bf1efdf887a12176555159dcb9`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6333 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`acroform_b64_00.js` `5a0b731d40a18d494d4b3dd849f8890815da00da1f57b3869759034e83022007`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3596 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 3 long base64-like blob(s).

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