PDF malware analysis — malicious · c63048bf7b8332de

MALICIOUS

PDF

9.1 KB Created: 2009-09-03 15:24:59 Authoring application: ZNtLIOYNMCXzxeUsLZpIm (via NARTinuCrUOxjRs)

MD5: 268a0065b6ea134054dc6aea300a830d SHA-1: fb716327c2362c2f0f89e8b45805b9666b0297f7 SHA-256: c63048bf7b8332decea19e7b768e1ef70a38bfa81f1a7538d2f102b498984348

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged by a machine learning classifier and ClamAV as malicious (Pdf.Dropper.Agent-7301570-0). Heuristics indicate the presence of embedded JavaScript, including the use of String.fromCharCode, suggesting obfuscation. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, which is a common dropper behavior.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Dropper.Agent-7301570-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7301570-0
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` `ae161ba6120191cd60ba5990e346bac892f5c0d78513e16d00567afeaef8ea37`	pdf-javascript-stream	PDF /JS object 7 at offset 0x3D5	7570 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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