PDF malware analysis — malicious · 34964c75e00e5391

MALICIOUS

PDF

5.4 KB Created: 2011-04-05 23:46:28 Authoring application: bfasddfub loasdfdsab

MD5: 0cc027c77b05efa1e389d0fc3e6bf15a SHA-1: 42c1643843879dd3cc608ae380263702d89d1e2e SHA-256: 34964c75e00e53912c9968e2b25ab6fc097c4962e00dca913467dd93536d835e

210 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell

This PDF file contains a critical vulnerability exploit for CVE-2010-0188, targeting Adobe Reader. Static analysis detected an embedded JavaScript payload within a decompressed stream, indicated by the 'PDF_UNESCAPE' and 'PDF_XFA_SCRIPT' heuristics. This script is likely responsible for downloading and executing a secondary payload, as suggested by the 'ML_NYX_PDF_MALICIOUS' classifier and the 'EXTRACTED_FILE_STATIC_TRIAGE' heuristic which noted script obfuscation indicators. The primary attack vector is the exploitation of the embedded XFA form.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 8

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.
XFA form contains risky executable script high CVE related PDF_XFA_SCRIPT

PDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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.
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_off00000357.js` `ff9379d39ce358a1046d79f8e52dfd396446427dc8698020c0e9884aa1c85b3d`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x357	56173 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).

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