Malicious PDF — malware analysis report

Static analysis result for SHA-256 269a56fd16087ecb…

MALICIOUS

PDF

78.4 KB
MD5: 9e8bb92d7187cefc3ef67876a9f1a19c SHA-1: 78d4d19c769804e329e88bb6cd8a81c60ff7db23 SHA-256: 269a56fd16087ecb5965c098a71de7d7a75655fe755877791efe8373b2ea5660
136 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: Malicious PDF T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file exploits CVE-2010-0188, a known vulnerability in Adobe Reader related to LibTIFF XFA image processing. The critical heuristic firing indicates the exploitation of this vulnerability. The presence of embedded scripts within the XFA form further suggests malicious intent, likely to download and execute a second-stage payload. The embedded file artifact also points to a multi-stage attack.

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.
  • XFA form contains executable script high CVE related PDF_XFA_SCRIPT
    PDF embeds an XFA form whose dataset contains a <script> or <xfa:script> block — XFA scripting has been the exploit primitive for several Adobe Reader RCEs (CVE-2010-0188 family, CVE-2018-4901, and others). Plain XFA without scripts is far less risky.
  • 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
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
39fc11ae5d8af2aed437459b807fa2456cb57b35459655c481810ddda5214cc6		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 79575 bytes

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