Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5b7b796a9509383…

MALICIOUS

PDF

4.2 KB First seen: 2012-10-03
MD5: 7f18b1ee4f50deb3cad433f3f6bd4f69 SHA-1: 74f1e136498c8e0618938698fc2fb21a17fb67a7 SHA-256: c5b7b796a95093834af3adb394c251c9d8536614f76599af48bbe4d959b9e494
110 Risk Score

Malware Insights

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

The PDF file triggered heuristics indicating an embedded script payload and an embedded file. The presence of an embedded script payload suggests the document is designed to execute malicious code. The embedded file is likely the payload itself. Without further analysis of the embedded script, the exact functionality remains unclear, but the overall pattern points to a malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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 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 script payload in PDF stream info 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 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/@ In PDF document text
    • http://www.xfa.org/schema/xfa-template/2.5/In PDF document text
    • http://www.xfa.org/schema/xfa-data/1.0/In PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xEA 12932 bytes
SHA-256: a29b3e3f89c901d0d82792be1b84ab827f9c287be33a981d292b278eb9a8f25c

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