PDF malware analysis — malicious · ece8277ff6fd1f34

MALICIOUS

PDF

9.1 KB Created: 2012-04-18 17:53:36 Authoring application: qSotrHCPAMpRDwDUBtPTu (via UqEjhkKjKObFPJScJh)

MD5: 23e1b22a6dbe618dd4ab0e2586c3561c SHA-1: be49830493fdd6d2b5b9553b1197339a7d79fb42 SHA-256: ece8277ff6fd1f34ecf4cd08cce3f390b740e16911405f0f552a8349fd39030e

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The file is a PDF document flagged by ClamAV as Pdf.Exploit.Agent-35572 and a machine learning classifier. It contains embedded JavaScript, indicated by multiple heuristic firings and the presence of a javascript_obj0007_000.js artifact. The JavaScript is likely responsible for exploiting a vulnerability within the PDF reader to execute malicious code. The document body text appears to be obfuscated or nonsensical, providing no clear user-facing lure.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Exploit.Agent-35572 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35572
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` `926a2230b7537fbfae7d4e694476951bbb7a3a0d651d286ef6e6450249fbe888`	pdf-javascript-stream	PDF /JS object 7 at offset 0x448	7428 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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