Pdf.Dropper.Agent PDF malware analysis — malicious · 4b1e303d9b7885e6

MALICIOUS

PDF

4.0 KB

MD5: 6a246cbda11f596ca937e261f348397c SHA-1: 87bfa915900c924efa8da0b1b4d19dd73b1f33af SHA-256: 4b1e303d9b7885e6a7e3baa646887989fd67df23be0f4f64a4d67a46164c832f

126 Risk Score

Malware Insights

Pdf.Dropper.Agent · confidence 95%

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript, including calls to eval() and String.fromCharCode(), indicating obfuscated code execution. ClamAV identified this as Pdf.Dropper.Agent-7212131-0. The JavaScript is likely responsible for downloading and executing a second-stage payload, a common technique for dropper malware.

Heuristics 6

ClamAV: Pdf.Dropper.Agent-7212131-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7212131-0
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` `3d70622f5122a752bed1ec30aaab4a6dee7d156b1617b82041466d89a5036790`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6261 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` `518b08d6f3bc3cce918767239aa14ddb9541da82291624bd0e6f7fe9828cec79`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3543 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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