Malicious PDF — malware analysis report

Static analysis result for SHA-256 a63c68d816294bbe…

MALICIOUS

PDF

42.5 KB
MD5: 43f35804386b54d4be5f18a8702c167e SHA-1: 5888a8d078702f9d4ad6aae18ba49f5bd0f6dff9 SHA-256: a63c68d816294bbe2cf1ab211157973c96ecc9e63e73178f209750d202d1b266
156 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment

The critical ClamAV detection 'Pdf.Exploit.Agent-36830' indicates this PDF is a known exploit. The presence of an embedded script payload and an embedded file further supports this. The embedded URLs are not directly malicious but are related to XFA forms, which can be exploited. No specific family could be identified.

Heuristics 6

  • ClamAV: Pdf.Exploit.Agent-36830 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36830
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • 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
828e5f2e601fc3375423c458f434ac2675fa0f66c90618af6ae307f4b023f262		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xC6 42746 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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