PDF malware analysis — malicious · 97f22c10681424b7

MALICIOUS

PDF

8.0 KB

MD5: c1dea80ae2e09cbcd36da6411ad3f677 SHA-1: 414299edeeb036a054b157bf30ca681f4a47a521 SHA-256: 97f22c10681424b7093c5ff3202893ef3670c8fe4f5c49a5a525441312fa307a

94 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of PDF_EVAL and PDF_FROMCHARCODE suggests the script is likely obfuscated and uses eval() to execute arbitrary code. The ML classifier also flagged this PDF as malicious. While no specific URLs or file paths were extracted, the script's primary function is to execute malicious code, likely leading to a second-stage payload download or execution.

Machine Learning

Nyx PDF Classifier malicious score 0.9224

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. (matched inside decoded stream)
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. (matched inside decoded stream)
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)
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://ns.adobe.com/xap/1.0/
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/pdf/1.3/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objstm_0024_00.bin` `6a8813849a3bbba5ec907321c40de07494b354313277ba80ef219620308604b8`	pdf-objstm-decoded	PDF /ObjStm 24 0 obj (inflated)	380 bytes

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