Pdf.Dropper.Agent-7212237-0 PDF malware analysis — malicious · 4bfafd8b52693538

MALICIOUS

PDF

2.3 KB

MD5: d608ffa9876cb1f003f70890de4a97b6 SHA-1: b5b982d4e93116bfde5cc2401440d0d137d17f36 SHA-256: 4bfafd8b5269353863dc1f9f5a8c2bfda0a843eb2c37bd3739dabfe262c7ea6d

196 Risk Score

Malware Insights

Pdf.Dropper.Agent-7212237-0 · confidence 98%

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript, which is heavily obfuscated using eval() and unescape() calls. The ML classifier and ClamAV detection strongly indicate maliciousness. The JavaScript is likely responsible for downloading and executing a second-stage payload, as suggested by the 'Dropper' family name and the presence of obfuscated script files. The primary attack vector is likely user interaction with the malicious PDF.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 7

ClamAV: Pdf.Dropper.Agent-7212237-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7212237-0
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111611_000.js` `e7d1232c16a6e584ebcad6ed89ed39659361935894de0b1df6aee2e4fe16ce04`	pdf-javascript-stream	PDF /JS object 111611 at offset 0x7EB	478 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `0b7014d98aaeaa089da57cff3346c84dedd89f291c7648bc1eec0c5d4ab5344c`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x189	2834 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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