PDF malware analysis — malicious · dcbcdea2a4c04117

MALICIOUS

PDF

7.7 KB Created: 2009-10-09 19:46:03 Authoring application: PDF Library 3.4.1 (via PDF Library 10.2.1)

MD5: 985669c81bb82127ee994d4e85915ffe SHA-1: c1a4256f97ba9214b0b02d6d95ab2ae070fbf8b7 SHA-256: dcbcdea2a4c0411779f3e8b364956b660fcce206d38eca3de757e4cb46343eab

86 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The ML classifier strongly flagged this PDF as malicious. The embedded JavaScript file, 'javascript_obj0007_000.js', is likely responsible for executing the malicious payload, potentially exploiting a vulnerability within the PDF reader. The ASCIIHexDecode filter also suggests obfuscation techniques commonly used in exploits.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
Suspicious extracted artifact medium 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.
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `fae4df50a242a6fb12c256c0b5beeed4e3e37fe5bf476fb9a81c3a384e085212`	pdf-javascript-stream	PDF /JS object 7 at offset 0x268	37425 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long hex-escaped blob(s).

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