PDF malware analysis — malicious · e4f92f4844587b34

MALICIOUS

PDF

35.2 KB

MD5: 09155cd559c7a53d34096112ef29fea5 SHA-1: 3074ea548b0832c524b47ade7c4088ff3bca863b SHA-256: e4f92f4844587b34f6e27e8cca98b7d66a35ad4a6c6101dde3870658ba982b3e

192 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF file exhibits multiple indicators of malicious activity, including embedded JavaScript and a Flash object. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of these embedded components indicates an attempt to execute code or exploit vulnerabilities upon opening the document, likely for delivering a secondary payload. The benign reputation of one URL does not negate the suspicious nature of the other embedded components.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 10

ClamAV: Pdf.Malware.Agent-9852235-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Malware.Agent-9852235-0
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
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.
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`Adobe.swf` `8f9c84c8c00bc62ae296a81fac6640aa852ea67548abc1bd639aa0da1a1696c4`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0xE43	27347 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.99, consistent with packed or encrypted content.
`javascript_obj0006_000.js` `46a36a2f4021f00b3a8a914ea55a55c3658defc6593d5e6b6b9d98ba4275cc3e`	pdf-javascript-stream	PDF /JS object 6 at offset 0x105	10488 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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