PDF malware analysis — malicious · de852f736047ec97

MALICIOUS

PDF

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

MD5: 83220f00d3b3cde40bd3bf58c78ba899 SHA-1: e936f1b63e4b0499ae31d28f750884147882ea9b SHA-256: de852f736047ec97566ee361507f8e8478003669405e942b8d5094c0659f629f

158 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that is obfuscated and uses an unescape function, indicating malicious intent. A critical heuristic firing confirms this as a known PDF exploit (Pdf.Exploit.Agent-35541). The presence of JavaScript actions and launch actions suggests the file is designed to execute arbitrary code or launch an external application, likely to download and run a secondary payload.

Heuristics 6

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
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.
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` `d54a00cee70e84edc560cdb39d42cc031a7949f7d658d20deaf6ca3c6e5cd3ce`	pdf-javascript-stream	PDF /JS object 27 at offset 0x21C1	3907 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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