PDF malware analysis — malicious · ecdbce7932f6c29c

MALICIOUS

PDF

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

MD5: 196f06337597ce32ec54b7283ff80648 SHA-1: 48c71d0a1950009fc7f9b08970530e5b2f1309c9 SHA-256: ecdbce7932f6c29c14afa30eba37e109ebc2549bee658e62908f931f1e521c22

228 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file was flagged as malicious by ClamAV with the signature Pdf.Exploit.Agent-35541. Static analysis revealed embedded JavaScript streams containing eval() and unescape() calls, indicating obfuscation and potential exploit code. The presence of a PDF_LAUNCH heuristic further suggests an attempt to execute external content. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves leveraging JavaScript within the PDF to trigger an exploit, likely leading to the download and execution of a second-stage malicious payload.

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)
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` `b0d1a9aae1c3618674c822f5d6a0f44f7f07c2989faf5dfaf6ff8d5b91bbd3c6`	pdf-javascript-stream	PDF /JS object 27 at offset 0x21C1	55922 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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