PDF malware analysis — malicious · d0f2314a14b1b224

MALICIOUS

PDF

74.1 KB Created: 2010-03-09 14:03:24 Authoring application: FmxXjY (via rb8oL0bAiFDu)

MD5: c37c024c8c27b14a66ec22d443691e9a SHA-1: 6bfea0ab7f2f01f3a779886c5ef53bb9f3042ba0 SHA-256: d0f2314a14b1b22472c33c735594a1a3c5dab43682f6ee0e975bd890d001ec21

156 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript, named javascript_obj0007_000.js, is likely responsible for downloading and executing a second-stage payload, a common dropper behavior.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 6

ClamAV: Pdf.Dropper.Agent-7218516-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7218516-0
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.
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_obj0007_000.js` `f01a002f04fd90e62bb8126ddda5109d4a64c95bf0974fade03cdc3dbea878e5`	pdf-javascript-stream	PDF /JS object 7 at offset 0x24A	74669 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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