PDF malware analysis — malicious · 8723a64ea63bf122

MALICIOUS

PDF

5.1 KB Created: 2011-04-05 23:46:28 Authoring application: bgsfsdffab

MD5: dc1031bfd600c91c5bf34d54f24aa91a SHA-1: 0502af4c1f8240e76307f88385fdf26db0e05256 SHA-256: 8723a64ea63bf12204eed12bf8de5131b007a6829f86bade1c05ceefa6709516

132 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious File T1059.001 PowerShell

The PDF file contains an embedded JavaScript file, identified by the 'ML_NYX_PDF_MALICIOUS' heuristic and the 'CVE_2010_0188' exploit. This exploit targets a vulnerability in Adobe Reader related to XFA forms and LibTIFF processing. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload. The ML classifier strongly indicates malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 7

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 script payload in PDF stream medium 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.
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
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_001_off00000326.js` `2e3557b9526227d4dc9d29edf4a2e3808feab89c7202b40a569955937da53490`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x326	55122 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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