PDF malware analysis — malicious · 5feec9d9a6a89876

MALICIOUS

PDF

5.3 KB Created: 2002-02-02 59:55:01 Authoring application: e

MD5: c1ccb9c60cda506130c1181944ee607c SHA-1: cfc80eed15809d24b21bad8b56caf1461e1c64d5 SHA-256: 5feec9d9a6a89876ba10df88037486ae79f57f8cd680714a6c0ce3c8d0b17835

122 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains an embedded JavaScript file that is associated with the CVE-2010-0188 exploit, targeting Adobe Reader. The ML classifier strongly indicates maliciousness. The embedded JavaScript is the primary artifact, likely containing the malicious payload or downloader.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 8

Adobe Reader LibTIFF XFA image exploit — CVE-2010-0188 critical CVE likely CVE_2010_0188

PDF contains the CVE-2010-0188 exploit template: XFA JavaScript heap-spray setup, a generated TIFF image payload, and assignment of that TIFF data to an XFA image field rawValue to trigger Adobe Reader's LibTIFF parser.
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
Embedded script payload in PDF stream low PDF_EMBEDDED_SCRIPT_PAYLOAD

PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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/xfa-template/2.5/
- http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0029.bin` `b9ed101af901bc4a6d6cbb8a2f88166c5ba597fc4d42a8b87d01d05115acde94`	pdf-embedded-file	PDF EmbeddedFile object 29 at offset 0x324	120 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`stream_003_off000003ee.js` `247eeecb2f08fd1aa59f8f2b505e71e95340be1a273d6beb3d37a833870da78f`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3EE	52784 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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