PDF malware analysis — malicious · 92be116e6b316ec3

MALICIOUS

PDF

5.8 KB Created: 2009-10-05 22:59:14 Authoring application: Scribus 1.3.5svn (via Scribus PDF Library 1.3.5svn)

MD5: 931a377e093148f968a64111800cb367 SHA-1: 7e402a430d4bd5b926df75acf1c8825d386048e3 SHA-256: 92be116e6b316ec3f0cfbbec1adca56eec6f91b79ec6e8bc55c473470dc45ca4

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file was detected as malicious by ClamAV with the signature Pdf.Dropper.Agent-7283359-0. 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 document body itself does not contain user-facing content, further suggesting its purpose is purely to deliver a malicious script.

Heuristics 6

ClamAV: Pdf.Dropper.Agent-7283359-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7283359-0
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_obj0016_001.js` `a1367c263119f1c007cd620aec61d773b1c998ef710e9697c0c8c8c87535e7ce`	pdf-javascript-stream	PDF /JS object 16 at offset 0x75B	13011 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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