PDF malware analysis — malicious · c8a1eb92facddce3

MALICIOUS

PDF

22.4 KB Created: 2011-72-51 03:25:00 Authoring application: String.fromCharCode

MD5: 958bf4a0e42742438e20428c81d8f212 SHA-1: f472282fb9aa9fe194ee1759e0c4bfa952f0e25a SHA-256: c8a1eb92facddce3c8f0a5e5aa455a89f47d45f0f5a75dbf5889fcb71875a323

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell T1059.003 Command and Scripting Interpreter: Windows Command Shell T1059.007 Command and Scripting Interpreter: JavaScript/TypeScript

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream is obfuscated and uses `eval()` and `String.fromCharCode`, suggesting it's designed to hide malicious functionality. The primary intent appears to be the execution of this obfuscated script, likely to download and run a second-stage payload. The extracted artifact `javascript_obj0001_000.js` is also suspicious.

Heuristics 5

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (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.
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_obj0001_000.js` `c02a60d2558cb78b5d40140cf795e5a91008d462bafe4900f1bf03809da54d75`	pdf-javascript-stream	PDF /JS object 1 at offset 0xA	518 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).

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