Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d1eccf2e6db1ab2…

MALICIOUS

PDF

18.9 KB
MD5: 2412a65819fb3231acb1ff2389915b95 SHA-1: da4a2e70ca59e62c29c8a318946a248756ae56a9 SHA-256: 2d1eccf2e6db1ab204f926d97e89a1b89a6490d2518d2914b07d6d5f77c9e4a4
130 Risk Score

Malware Insights

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

The PDF was flagged as malicious by ML classifiers and ClamAV, indicating it contains an exploit. The presence of an embedded file and script payload suggests it's designed to download and execute a secondary payload. The embedded file 'embedded_file_obj0008.bin' is a primary indicator of malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSEOF. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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
b49bd86bb9e9b7329a49be4e41e4fe09de5023fcd66ac8e288dc8d3bc7296786		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC8 18644 bytes

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