PDF malware analysis — malicious · 3b2e63ae62a88c3f

MALICIOUS

PDF

29.5 KB

MD5: 3536a2492e7faae4375e2878a4c6128f SHA-1: 73ac72e9c2a74b51149b160d3bb65958cbc0b4b2 SHA-256: 3b2e63ae62a88c3f7c6f94e5ca21c6f88b78521740b3912feeafa6d313a13119

232 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating it contains exploit code. It embeds a Flash file (20101297.swf) and a JavaScript stream (javascript_obj0006_000.js), both of which are common vectors for delivering secondary payloads. The presence of JavaScript actions and embedded files strongly suggests an attempt to execute malicious code upon opening the PDF.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 10

ClamAV: Pdf.Exploit.Agent-35955 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35955
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
RichMedia (Flash) high PDF_RICHMEDIA

PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
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
`20101297.swf` `155cb1ff00e6c687a380ad31d1ca035be4d34d8d46179a65e733a7fef7b99805`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x7F6	53922 bytes
Detection ClamAV: Pdf.Exploit.Agent-35955 Obfuscation or payload: unlikely
`javascript_obj0006_000.js` `a9b4d2bcbb41e4a21b0727c47c78330244609b829f909c27dbace2752e03172e`	pdf-javascript-stream	PDF /JS object 6 at offset 0x106	9020 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 198 eval/decoder/string-building token(s).

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