PDF malware analysis — malicious · 139d7c4f17160f2e

MALICIOUS

PDF

430.7 KB

MD5: ce0597f81f1f46ea42fbb5fc7b042644 SHA-1: 2bb4c18be2073efb88cfc81b0c22bc7189b37e61 SHA-256: 139d7c4f17160f2eae3ec8989403db7dedf9d4b6ffabea0d9cfaa08d4ec03e88

186 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains JavaScript and a RichMedia (Flash) object, which is flagged as a critical PDF JavaScript exploit cluster. An embedded Flash file named 'Tatsumaki.swf' was extracted. This suggests the PDF is designed to exploit vulnerabilities to execute the embedded Flash content, likely as a downloader or initial stage for further compromise.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 9

PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
RichMedia (Flash) high PDF_RICHMEDIA

PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
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.
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://ns.adobe.com/xdp/
- http://www.xfa.org/schema/xci/2.6/
- http://www.xfa.org/schema/xfa-template/2.6/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`Tatsumaki.swf` `4a802eb83c56a0be6b84e9e5dad83eb1354086b8a51d786ed433aaee0efe86fa`	pdf-embedded-file	PDF EmbeddedFile object 18 at offset 0x2CFA	4637 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.95, consistent with packed or encrypted content.

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