Pdf.Dropper.Agent-7309161-0 PDF malware analysis — malicious · d5be35c929acce17

MALICIOUS

PDF

2.6 KB

MD5: 813a6d78e3739449a23dbd2a34f0a468 SHA-1: b8f8475c15c6a9432c7e1036db72bce4902b84c6 SHA-256: d5be35c929acce17f6dc359227c4a650f58dd184eade8179eaf2d361b8a905cb

166 Risk Score

Malware Insights

Pdf.Dropper.Agent-7309161-0 · confidence 95%

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream utilizes `eval()` and `unescape()` functions, along with `String.fromCharCode`, suggesting obfuscation and dynamic code execution. ClamAV detection confirms this as Pdf.Dropper.Agent-7309161-0. The primary function of the embedded script appears to be downloading and executing a second-stage payload, a common dropper behavior.

Heuristics 7

ClamAV: Pdf.Dropper.Agent-7309161-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7309161-0
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 0x93C	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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