PDF malware analysis — malicious · 99bb77d1e24920b3

MALICIOUS

PDF

3.8 KB Authoring application: hXr (via va)

MD5: 6ffbc69c30cf3630025b510f631df99b SHA-1: 81c8678a44780b18b959c6ae42c7e5b8b47fb1b8 SHA-256: 99bb77d1e24920b3b32d0e3f9b60d8fd54fd3e43073707a5be60053d66493950

98 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.001 PowerShell

The PDF file contains an embedded script payload and triggers the CVE-2010-0188 exploit, which targets Adobe Reader's LibTIFF component. This indicates the document is designed to achieve arbitrary code execution upon opening. The embedded file, 'embedded_file_obj0041.bin', is likely the secondary payload. The exploit's nature suggests a downloader or dropper functionality.

Heuristics 5

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
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
`embedded_file_obj0041.bin` `93db645e242d56f3204f2029c2a321a87bad94730078635ac2d925c4ab4d2819`	pdf-embedded-file	PDF EmbeddedFile object 41 at offset 0x53	9902 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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