PDF malware analysis — malicious · 70918728ffbfd726

MALICIOUS

PDF

260.9 KB

MD5: 11c530b4ada961e8499a6df5108df4ee SHA-1: 3ef89946e5f678e77a1af27ce1c39fe8dcd424a5 SHA-256: 70918728ffbfd72647b4ebc5e8d203a1588d4ddedff36b0626f1bb8a335a0c0a

366 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file contains embedded JavaScript and a Flash object (SWF) that are flagged as malicious. Critical heuristics indicate exploitation of CVE-2011-2462, a known vulnerability in Adobe Reader's RichMedia/U3D parser. The embedded JavaScript, though heavily obfuscated, is designed to execute, likely to download and run a secondary payload. The presence of an extracted SWF file further supports the exploitation vector.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 12

Adobe Reader U3D/RichMedia parser exploit critical CVE likely CVE_2011_2462_RICHMEDIA_U3D

PDF combines U3D stream markers with RichMedia and JavaScript/XFA activation surfaces. This is the U3D RichMedia exploit document shape associated with CVE-2011-2462, even though the U3D marker is not exposed through the canonical /Subtype /U3D dictionary.
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.
ClamAV: Swf.Exploit.Kit-513 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Swf.Exploit.Kit-513
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
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`aaa.swf` `82959a74bd2f365dbaff0af8a126e8d6efed63f658723f179f7020ea3628ed8b`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x36A6D	27931 bytes
Detection ClamAV: Swf.Exploit.Kit-513 Obfuscation or payload: likely Carved artifact entropy is 7.99, consistent with packed or encrypted content.
`javascript_obj0006_000.js` `d0642f875bd5c7c73ddaf0327807f49d254fe5e59475be658fb1bfe1d2d5e19f`	pdf-javascript-stream	PDF /JS object 6 at offset 0x122	690249 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.