PDF malware analysis — malicious · a9af634c68f30052

MALICIOUS

PDF

5.1 KB Created: 2011-04-05 23:46:28 Authoring application: bgsfsdffab First seen: 2013-08-26

MD5: 94b2ffbf89ffd1c2460ee683f3da292f SHA-1: 4dd0ba91e969ed2d7c2ee87e35f79581ab399ca3 SHA-256: a9af634c68f3005222c22d19845fe36aca6251adbb8580aacc266805b7277fbe

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file exhibits suspicious characteristics, including an embedded file and an embedded script payload. The extracted JavaScript file, stream_001_off00000316.js, is the primary indicator of malicious intent. This script is likely designed to download and execute a second-stage payload, which is a common technique for malware delivery. The presence of XFA forms and differential parse failures are noted but do not directly contribute to the attack pattern. Confidence is moderate due to the lack of specific script content analysis.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 9

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.
PDF embedded file could not be fully decoded medium PDF_EMBEDDED_FILE_UNDECODED

A declared PDF /EmbeddedFile stream uses filters that the scanner could not decode. The raw stream was carved for artifact triage because malformed or unsupported attachment filters can hide payload content from normal extraction.
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 info 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/\ In PDF document text
- http://www.xfa.org/schema/xfa-template/2.5/In PDF document text
- http://www.xfa.org/schema/xfa-data/1.0/In PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_001_off00000316.js`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x316	55442 bytes
SHA-256: `725728162cc2f72606c5e583195e3155bce0eadb2d48187ac6df96a02c459775`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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