Pdf.Dropper.Agent PDF malware analysis — malicious · 2fc45b497e571645

MALICIOUS

PDF

6.4 KB Created: 2009-10-25 20:35:22 Authoring application: Scribus 1.3.5svn (via Scribus PDF Library 1.3.5svn)

MD5: 4b76cf16bf89c87e5c2127d2f9ab176a SHA-1: 84d71e68dbd8d51d65e5d9de9ccf873ca2a15de0 SHA-256: 2fc45b497e571645eccf02cb2b4381f0acdf6755f15432ef1542f6f7c025b364

126 Risk Score

Malware Insights

Pdf.Dropper.Agent · confidence 95%

MITRE ATT&CK

T1059.001 PowerShell

The file is identified as a malicious PDF by ClamAV with the signature Pdf.Dropper.Agent-1828670. Static analysis revealed embedded JavaScript, including the use of unescape() and String.fromCharCode, indicating obfuscation. This JavaScript is likely responsible for downloading and executing a second-stage payload, a common dropper behavior. The presence of JavaScript actions and streams within the PDF further supports this conclusion.

Heuristics 6

ClamAV: Pdf.Dropper.Agent-1828670 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-1828670
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_obj0013_001.js` `fe39c80700d971dd804466c400bde39f83c72c65e65a77e06de12e12b3987ab4`	pdf-javascript-stream	PDF /JS object 13 at offset 0xC11	10804 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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