Malicious PDF — malware analysis report

Static analysis result for SHA-256 39ca904ac0519d75…

MALICIOUS

PDF

99.7 KB
MD5: 707ac87b7d9431efe25f3e939c759386 SHA-1: 0ffa800af6885f5d06368841cdba4839d89a51e6 SHA-256: 39ca904ac0519d7583ee98c24bc571721ec090befe0cf5d6929030075436f42e
136 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: User Execution: Malicious File T1566.001 Phishing: Spearphishing Attachment T1204 User Execution

The PDF file exploits CVE-2010-0188, a known vulnerability in Adobe Reader related to XFA forms and LibTIFF processing. The heuristic firings indicate an embedded script payload within an XFA form, which is characteristic of exploit delivery. The embedded file and script suggest the PDF is designed to download and execute a secondary malicious payload upon opening.

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
1d2bd20ab950fe3881b25602f51a437966e9564e370dab2cec4064e9e1162769		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 101385 bytes

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