Malicious PDF — malware analysis report

Static analysis result for SHA-256 a49fc190f8c10496…

MALICIOUS

PDF

85.8 KB
MD5: 0e5323cc2c649313f5eda10e487c7b78 SHA-1: 317036bb8c2fabbb03e4c2259f01029dcbbd4ae2 SHA-256: a49fc190f8c1049628498fcb48b14553d9eea35b09863e58359ac30f5465435b
196 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1059.001 PowerShell T1566.001 Spearphishing Attachment

The file is a PDF document that leverages the CVE-2010-0188 exploit targeting Adobe Reader's XFA forms. This exploit is designed to download and execute a secondary payload. The presence of embedded scripts and an embedded file further supports the malicious intent. While specific family attribution is not possible, the exploit and delivery mechanism are clear.

Heuristics 7

  • 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.
  • ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
  • 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
028a4ed5b41da0f03b0ae6fc80203d750329ca0693f215cf82bf70ea1953b880		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 87090 bytes

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