PDF malware analysis — malicious · 2687e2fde5ab0a13

MALICIOUS

PDF

4.9 KB Created: ego taw Authoring application: ego taw

MD5: 2d206d0700bcb3ecab9f263b3ab09ac3 SHA-1: 7aee7b3c9f7550104e04e303d33fbe194a019a08 SHA-256: 2687e2fde5ab0a13dfcdb2356b5993fadc275843fb40ed64e1545c7d4122b957

96 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 presence of a PDF_EVAL heuristic firing suggests that the JavaScript is attempting to execute arbitrary code, likely to download and run a secondary payload. The ML classifier also strongly flags this PDF as malicious. No specific family could be identified, but the techniques used are common for initial access via malicious documents.

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)
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_obj0006_000.js` `fe1b6f06684fa7cdb045df837a3d0c39a8200f82748794e02c2b911dc9564f16`	pdf-javascript-stream	PDF /JS object 6 at offset 0x1A4	20789 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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