PDF malware analysis — malicious · d6c5536a4a69b4b6

MALICIOUS

PDF

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

MD5: 78e9888510df6b5514e060c7a1393d58 SHA-1: 3fd14cd33310cdf7aa64fcd7b0ba6564b60724ab SHA-256: d6c5536a4a69b4b629ebf19f694d42405a7414d214d246f73856f57c90d32439

156 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.001 Malicious Link: Malicious Link T1204.002 Malicious Link: Malicious File T1059 Command and Scripting Interpreter T1059.003 Command and Scripting Interpreter: Windows Command Shell

The PDF file contains an embedded JavaScript payload that exploits CVE-2010-0188, a vulnerability in Adobe Reader related to LibTIFF XFA images. The critical heuristic firing confirms this exploit. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload, although its exact functionality is obscured by obfuscation. The PDF structure also indicates an XFA form and an embedded file, further supporting the exploit delivery mechanism.

Heuristics 6

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.
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.
Suspicious extracted artifact medium 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.
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

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_001_off00000324.js` `20698d4b7304ba04017ae8de98f6a44cbd09550785560d3b2518e1463a9a0c73`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x324	52282 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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