PDF malware analysis — malicious · f92ba0a405a81090

MALICIOUS

PDF

20.1 KB Created: 2009-10-08 19:46:11 Authoring application: PDF Library 5.1.7 (via PDF Library 6.6.10)

MD5: bd9a0679f76073fa62a29f838b378616 SHA-1: e1d7b2766c1f484dba7de6eb0d378a67f79d513c SHA-256: f92ba0a405a81090a5516cf081d60db6d33832eff190326b22e9b7d727f0dbe7

128 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The ML classifier strongly flags this PDF as malicious. The JavaScript stream, named javascript_obj0007_000.js, is obfuscated and likely responsible for executing a secondary payload. The PDF also utilizes ASCIIHexDecode and unescape() for obfuscation, common techniques in malicious PDF delivery.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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.
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `70813bf69d7558cf09d5eb64ed025b1c52d3913cb68b7662f88e1b8315a0195e`	pdf-javascript-stream	PDF /JS object 7 at offset 0x268	21941 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long hex-escaped blob(s).

Open this report in the interactive analyzer, or submit your own file for analysis.