PDF malware analysis — malicious · 922c45004dcc2079

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: 58af8782e074fcda2de6bdb71a25c9c6 SHA-1: 9835b4cef444e43d8678dc467fa1de0cc20ef6d3 SHA-256: 922c45004dcc2079098b446ade044d23d2f8099e2ec52dbdbcd69ba5a26b334f

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file exhibits multiple JavaScript-related heuristics, including embedded JS streams and unescape/fromCharCode calls, indicating obfuscated code execution. ClamAV detection as 'Pdf.Dropper.Agent-7283161-0' strongly suggests a dropper functionality. The presence of obfuscated JavaScript points to an attempt to download and execute a secondary payload, a common tactic for malware delivery.

Heuristics 6

ClamAV: Pdf.Dropper.Agent-7283161-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7283161-0
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_obj0013_001.js` `e77aaf54876226c1f12ba73ff19aa6c60af388c48593a42235e23e8382748fae`	pdf-javascript-stream	PDF /JS object 13 at offset 0x1917	11272 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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