PDF malware analysis — malicious · b201036bc70b4cf8

MALICIOUS

PDF

7.7 KB Created: 2009-10-11 19:43:40 Authoring application: PDF Library 8.10.7 (via PDF Library 1.4.7)

MD5: ba8ac46e98c4b984fb7317855445bd19 SHA-1: 9591983ed5d83a514a93924f8ec6ec074625c6f2 SHA-256: b201036bc70b4cf8f8fdc11507c9f72c553623bdec74291bcdcff82756313060

86 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The ML classifier also flagged this PDF as malicious with a high probability. The embedded JavaScript, named javascript_obj0007_000.js, is likely responsible for executing the malicious payload. The presence of ASCIIHexDecode filter with exploit indicators further suggests exploitation.

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` `436f95cfb74464a5f05d83ad33a3f4719884ab2feedbf79fe6cbe4beabbef3c2`	pdf-javascript-stream	PDF /JS object 7 at offset 0x268	37737 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long hex-escaped blob(s).

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