PDF malware analysis — malicious · 8a2ac9ca9a82cc28

MALICIOUS

PDF

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

MD5: aa6b5ee68ba71fec195c49164c5d8a04 SHA-1: 0d7e5dc1b7c7d6b70516e32ee3c58622185791b5 SHA-256: 8a2ac9ca9a82cc28cdfb39aafc0a23f19693d71135be131cc26f654f6cf42dea

196 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged by ClamAV as Pdf.Exploit.Agent-35541 and exhibits multiple high-severity heuristics indicating JavaScript execution and a launch action. The embedded JavaScript stream, identified as javascript_obj0027_000.js, likely contains obfuscated code that attempts to exploit a vulnerability within the PDF reader. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves leveraging a PDF exploit to achieve arbitrary code execution, likely for downloading and running a second-stage 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)
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` `3bdd1180ae7156b548b5c88d2c90a96060765a1d1fadbb2bb149c9df8a64ae38`	pdf-javascript-stream	PDF /JS object 27 at offset 0x21C1	4618 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.