PDF malware analysis — malicious · ccac94fedde0cef4

MALICIOUS

PDF

10.1 KB Created: 2009-02-19 14:45:49 -02:00 Authoring application: Writer (via OpenOffice.org 3.0)

MD5: b1490e0846aecab349a58c7d5b37dc39 SHA-1: 495371c9644fca22c6c7847f83b6f29c5832e3d5 SHA-256: ccac94fedde0cef4fa003bf50090a7030c1d31cb80202eac51abe8449a674cb9

196 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The PDF_LAUNCH and PDF_EVAL heuristics, along with the ML classifier and ClamAV detection (Pdf.Exploit.Agent-35541), strongly suggest this PDF is designed to exploit a vulnerability. The embedded JavaScript, likely obfuscated, is responsible for executing malicious code, which is a common technique for downloading and running further stages of an attack. The lack of document body text means the specific lure cannot be determined, but the technical indicators point to a malicious exploit.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 7

ClamAV: Pdf.Exploit.Agent-35541 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35541
Launch action high PDF_LAUNCH

PDF contains a /Launch action with an unresolved or extension-less target — treat as potentially dangerous
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (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_obj0027_000.js` `e7c7e71f828753f29ebc36193d797af1a1af3f07ead6a208af03f7185b307a00`	pdf-javascript-stream	PDF /JS object 27 at offset 0x1D69	23199 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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