PDF malware analysis — malicious · 5103cded4bb74ad6

MALICIOUS

PDF

5.1 KB Created: 2011-04-05 23:46:28 Authoring application: sab First seen: 2013-08-22

MD5: 3e9bfc44b099ad8606b5e8a9abdd8034 SHA-1: 10c4801c1beb1b7f4b49a700cebd1b8300602c91 SHA-256: 5103cded4bb74ad6aa98ab71f429494caf05621800dc467e784c51e9d8bd7e4b

136 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged for containing an embedded script payload. Static analysis identified a JavaScript file (stream_001_off00000302.js) within a PDF stream, which is a common technique for delivering malicious content. The script's purpose is likely to download and execute a second-stage payload, although its exact functionality could not be fully determined due to potential obfuscation or truncation. The presence of an embedded script and the suspicious nature of the extracted file strongly suggest a malicious intent.

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_off00000302.js`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x302	55717 bytes
SHA-256: `61356b9cb178f9396b61b2e1f18f183ddfd0d4f34ec6653931a9842d1e7caf76`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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