PDF malware analysis — malicious · 3e28f4e0c2ee5c27

MALICIOUS

PDF

2.5 KB

MD5: 7552003091897394ff6366da3cfe5058 SHA-1: 9571504410f18c0fd063eeea4c562306bc07588e SHA-256: 3e28f4e0c2ee5c274d2839fef9596da5fb69bcedee09d204e12e36e50374fcf2

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript/TypeScript

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream utilizes eval() and String.fromCharCode() for obfuscation, a common technique to hide malicious code. This obfuscated script is likely designed to download and execute a second-stage payload, contributing to the overall malicious nature of the document. No specific family could be identified due to the heavy obfuscation.

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. (matched inside decoded stream)
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_obj0005_000.js` `8f66346ff8fff6c24af3f5532437409e3d4bae295628302f69c1c4f895c00701`	pdf-javascript-stream	PDF /JS object 5 at offset 0x107	7508 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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