PDF malware analysis — malicious · a1b0d894912bc270

MALICIOUS

PDF

5.2 KB Created: 2008-07-26 19:43:58 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: b36e736b902d7395e368bdea6f024cf4 SHA-1: 0cfdfa9f46961a1f40693676b3a4076e1f24e03c SHA-256: a1b0d894912bc2700e8fbbd5a5ed00705bbfe8b47db97078dee31878bc59228c

128 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 presence of PDF_EVAL and PDF_UNESCAPE suggests the JavaScript is obfuscated and likely malicious. The ML classifier strongly flags this PDF as malicious. The extracted artifact 'javascript_obj0014_000.js' is a key indicator. The overall pattern suggests the PDF is designed to exploit vulnerabilities and execute arbitrary code, likely for downloading further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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.
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_obj0014_000.js` `233d0579b2b7e14351d4aeadbb39318eccf52144ed3c98473d3c091c9c6df2cd`	pdf-javascript-stream	PDF /JS object 14 at offset 0x38D	67995 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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