PDF malware analysis — malicious · 42749cd695ab70bc

MALICIOUS

PDF

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

MD5: 02f632f3d0761d88a9a876dca6810987 SHA-1: af791dd1984730714f710cd2d755c29a12ccbe88 SHA-256: 42749cd695ab70bc99f276fa8e1de3b8472359955e87fbfff9c79a4794101b28

196 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file was flagged by ClamAV as Pdf.Exploit.Agent-35541, indicating a known malicious signature. High-severity heuristics indicate the presence of JavaScript with eval() calls and a launch action, suggesting the execution of arbitrary code. The ML classifier also strongly indicated maliciousness. The embedded JavaScript stream, though obfuscated, likely facilitates the download and execution of a second-stage payload, which is a common attack vector for this type of PDF.

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` `52a2b6bcecd91a978fd8cbb15707ceff69f565da0df91052b69c5c4c009a8887`	pdf-javascript-stream	PDF /JS object 27 at offset 0x21C1	4578 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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