PDF malware analysis — malicious · 1a0c3ee66b30116c

MALICIOUS

PDF

9.8 KB Created: 2009-10-04 13:45:55 Authoring application: Scribus 1.3.5svn (via Scribus PDF Library 1.3.5svn)

MD5: 8e0b00c8addd3320e663af46ad5c75e4 SHA-1: 710e99c1a46a573b744b77451707a246211b1e19 SHA-256: 1a0c3ee66b30116c6ef4cf712f602acd64300cc9115521dc77a781d445fc0124

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The critical ClamAV detection and multiple PDF-specific heuristics indicate malicious intent. The embedded JavaScript, identified as 'javascript_obj0013_001.js', likely contains obfuscated code designed to download and execute a secondary payload, as suggested by the 'unescape()' and 'String.fromCharCode()' firings. The file is classified as a dropper based on these indicators.

Heuristics 6

ClamAV: Pdf.Dropper.Agent-1828660 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-1828660
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` `5c90edc38323aeba9b2a7857d4bbe58cebe3fcdb0b7f71111049d1cab06c8edd`	pdf-javascript-stream	PDF /JS object 13 at offset 0x1917	10923 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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