Malicious PDF — malware analysis report

Static analysis result for SHA-256 072693c0949bbde3…

MALICIOUS

PDF

141.4 KB Created: 2010-03-21 10:36:25 Authoring application: llPDFLib program (via llPDFLib 3.x)
MD5: 299a137a703f6bfc92aef7d10f564031 SHA-1: 3efbef2c89f6f1175d125c9d9f4c8c441ea80409 SHA-256: 072693c0949bbde3319c131be343902fdb1ca59b1d539531cc9ac7e1ebbfa1f9
112 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The sample is a PDF document that contains an embedded exploit targeting CVE-2010-0188 in Adobe Reader. The ML classifier also flagged this PDF as malicious with a high probability. The exploit is designed to execute arbitrary code, likely leading to the download and execution of a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9870

Heuristics 6

  • Adobe Reader LibTIFF XFA image exploit — CVE-2010-0188 critical CVE likely CVE_2010_0188
    PDF contains XFA image data with an inline crafted TIFF payload and shellcode/delivery markers. This is the data-bound variant of the CVE-2010-0188 Adobe Reader LibTIFF/XFA exploit shape.
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Suspicious extracted artifact info 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 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://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xci/1.0/
    • http://www.xfa.org/schema/xfa-template/2.4/
    • http://www.xfa.org/schema/xfa-data/1.0/
    • http://ns.adobe.com/xtd/
    • http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0001.bin
abbf9faf59a168141cc70da8732fc2879df0d8c54926424071498a26e76c2717		 pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x57 13430 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).
stream_005_off0002021c.bin
09c0287cf1909deec4a6dc5089de8c422f9bd424587ca092f28c1b798e6a837a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2021C 5825 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.55, consistent with packed or encrypted content.

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