PDF malware analysis — malicious · f72a13df478bbce4

MALICIOUS

PDF

2.7 KB

MD5: 99a57b9a044a15b5b7826177cfc92a27 SHA-1: 414c0c222eabd8a3a721a01b87ce72f1d93403ca SHA-256: f72a13df478bbce4db082ab8cf4cb1dd6364b8be331f3f1b8c0ac24a44abfee9

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The PDF_EVAL heuristic firing suggests that the JavaScript is likely using an eval() call to execute arbitrary code, and PDF_FROMCHARCODE indicates obfuscation techniques. The extracted JavaScript files, javascript_obj111611_000.js and javascript_obj111612_001.js, are suspicious artifacts. The primary attack pattern involves leveraging these JavaScript capabilities to achieve malicious objectives, likely downloading and executing a secondary payload.

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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111611_000.js` `8dbde0263aedcfa2786d115b2cead33a1396b1f12774edbd303c19e98a94968e`	pdf-javascript-stream	PDF /JS object 111611 at offset 0x197	257 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj111612_001.js` `d6eda842772a75c33928d27e9dffa62881f49bb46b9c18d6b31ada5457b21a06`	pdf-javascript-stream	PDF /JS object 111612 at offset 0x267	3350 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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