PDF malware analysis — malicious · 1b9ccb8f42b3f281

MALICIOUS

PDF

5.2 KB Authoring application: stb

MD5: 174dcfdafb9296b53795e839c040d34b SHA-1: 521218d7e590c8108a0cc6855fc063a800d59a87 SHA-256: 1b9ccb8f42b3f2819170ee99386498ba81d859626bb0df7b3479ffc93bda43ee

132 Risk Score

Malware Insights

The PDF file contains an embedded JavaScript payload that exploits the CVE-2010-0188 vulnerability in Adobe Reader. This exploit is designed to download and execute 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_off000002e2.js` `28fcf34d6e02eed4a1279bc2d3862508aab33a53258560c938452646da50ef0f`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x2E2	73945 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 long base64-like blob(s).

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