PDF malware analysis — malicious · 8c4aeb5950b54b87

MALICIOUS

PDF

3.9 KB Authoring application: rxode (via va)

MD5: f67c94248d57db85330d8b2d74048b3b SHA-1: 3c5b4c8b49eb060193e602619871f15966cc72d1 SHA-256: 8c4aeb5950b54b87f38014fe2ed3e3a28bb7a7e9701475e09e2beee72edb8aaa

98 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Phishing: Spearphishing Attachment

The PDF file contains an embedded XFA form and triggers the CVE-2010-0188 heuristic, indicating exploitation of a LibTIFF vulnerability in Adobe Reader. An embedded script payload was also detected, suggesting the file is designed to download and execute a second-stage payload. The embedded artifact 'embedded_file_obj0041.bin' is likely the delivered payload.

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` `325fd86063d07319c0dc2fbd8fdf02e7d6103abc183d7d6f7dfedb6d638e058e`	pdf-embedded-file	PDF EmbeddedFile object 41 at offset 0x53	9795 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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