Malicious PDF — malware analysis report

Static analysis result for SHA-256 012c709f15f59c57…

MALICIOUS

PDF

10.4 KB
MD5: b0541d58120025468f5c6697b0bd3cd5 SHA-1: dd6b65bc8bd41e7404e07546549fb5d25d00c46b SHA-256: 012c709f15f59c57d894b17bacaf06b36933ff6c2e266b3770bf1d54c3219b69
110 Risk Score

Malware Insights

MITRE ATT&CK
T1566.003 Phishing: Spearphishing Attachment T1204.002 Malicious File: User Execution: Malicious File

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for obfuscated objects and an ML classifier indicating high maliciousness. It contains an embedded file, 'embedded_file_obj0001.bin', which is a strong indicator of a malicious payload delivery mechanism. The presence of XFA forms and embedded files suggests an attempt to exploit PDF viewer vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • 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
  • 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://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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0001.bin
81bba1e09c530fae0e4ea1bbcaefb933a38ff8e7450ef1ac0e899374531668af		 pdf-embedded-file PDF EmbeddedFile object 1 at offset 0x7C 13408 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).

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