PDF malware analysis — malicious · 77d080c5358914b4

MALICIOUS

PDF

217.9 KB

MD5: 81e285100f1a3fbcd6d25947526ffe26 SHA-1: 86133dfdc155d4076dea0d412c1a4dc3e91d6506 SHA-256: 77d080c5358914b44a23edf389635103b723a855bac6c6da196d5476964d0a29

336 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF contains embedded JavaScript and a Flash RichMedia object that exploits CVE-2010-1297. The JavaScript is heavily obfuscated but appears to be responsible for triggering the Flash exploit, which in turn likely executes a second-stage payload. The embedded SWF file and the URLs associated with code.flashdynamix.com are suspicious and likely involved in the exploit chain.

Machine Learning

Nyx PDF Classifier malicious score 0.9806

Heuristics 9

Adobe Flash authplay SWF exploit in PDF — CVE-2010-1297 critical CVE likely CVE_2010_1297_FLASH_RICHMEDIA

PDF combines RichMedia Flash activation, a crafted SWF with ActionScript prototype/AVM-era markers or the AES-PHP/authplay variant markers, and PDF-side shellcode heap-spray staging. This is the static delivery shape associated with CVE-2010-1297 in Adobe Reader's bundled authplay.dll.
Hex-obfuscated scripting name object critical PDF_OBFUSCATED_NAME_OBJECT

A PDF name object that drives script execution (/JavaScript or /JS) is written with #XX hex escapes to hide it from string-based scanners — e.g. /J#61v#61S#63r#69p#74 decoding to /JavaScript. Legitimate PDF producers always write these names literally; hex-encoding an executable name is a deliberate evasion used by exploit-kit and dropper PDFs.
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
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://code.flashdynamix.com/AES/aes-decrypt.php
- http://code.flashdynamix.com/AES/aes-encrypt.php
- http://adobe.com/AS3/2006/builtin

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`WpuVlEGnF.swf` `bf9dea6ff47dfb47c2f51b1fa9a09527dfe5e95399ccb2d043ba956b197360c9`	pdf-embedded-file	PDF EmbeddedFile object 16 at offset 0x2FD5E	52647 bytes
Detection ClamAV: Pdf.Exploit.Agent-35955 Obfuscation or payload: unlikely
`javascript_obj0006_000.js` `adddc6330c1fade3051c55a3e6d184f626d547a717e6ef8569bd3481d61d86ae`	pdf-javascript-stream	PDF /JS object 6 at offset 0x13E	6478 bytes

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