PDF malware analysis — malicious · 57f940efacd6cc60

MALICIOUS

PDF

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

MD5: db6863f79f0ff06d2f285decb312996f SHA-1: e3407ef8f96df71a68575211a315dbe4e931edae SHA-256: 57f940efacd6cc60296da00586fa3b1a1d6d1dafad5c91bfb15d10f10f82ae5f

132 Risk Score

Malware Insights

MITRE ATT&CK

T1190 Exploit Public-Facing Application

The PDF sample contains a critical heuristic indicating exploitation of CVE-2010-0188, a known vulnerability in Adobe Reader related to XFA forms. An embedded JavaScript file was also extracted, suggesting a secondary stage of execution. The ML classifier strongly supports the malicious verdict. The extracted JavaScript is likely responsible for downloading and executing a second-stage payload.

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_off00000316.js` `443095061de5f8f59962e686e9c4cf900c8c053320566a91c53e272253524ed8`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x316	56457 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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