Pdf.Dropper.Agent-7313133-0 PDF malware analysis — malicious · dd5cac41f20b9b73

MALICIOUS

PDF

2.1 KB

MD5: 570733f97839812d0b827108a29a5285 SHA-1: 4ac908f8b784cb4f8cfa2032416f11a6b9394738 SHA-256: dd5cac41f20b9b739867bc5953a0a57f09e3d0355e0eda9198a6f23e4754e1c3

166 Risk Score

Malware Insights

Pdf.Dropper.Agent-7313133-0 · confidence 95%

MITRE ATT&CK

T1059.001 JavaScript/JScript

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, PDF_EVAL, PDF_UNESCAPE, and PDF_FROMCHARCODE. The ClamAV detection of 'Pdf.Dropper.Agent-7313133-0' strongly suggests its malicious nature. The embedded JavaScript, specifically the use of eval() and unescape(), is likely employed to obfuscate and execute a secondary payload, which is a common dropper technique. The extracted artifact 'javascript_obj111611_000.js' further supports the presence of script-based malicious activity.

Heuristics 7

ClamAV: Pdf.Dropper.Agent-7313133-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7313133-0
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 0x743	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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