Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ba96668deee4b29…

MALICIOUS

PDF

42.6 KB
MD5: f8ab65389e7553318e36f9c4d04a85c3 SHA-1: b320d4312004c9ec810377480ea2e246bd12bd14 SHA-256: 2ba96668deee4b29a44ffbd1535a364f44e7925a5aeb747c78cd1b51c409cd52
188 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File T1566.001 Spearphishing Attachment T1059.001 PowerShell

The file is identified as malicious by ClamAV with the signature Pdf.Exploit.Agent-36836. Static analysis detected embedded script payloads and an embedded file, indicating a likely exploit delivery mechanism. The ML classifier also strongly flagged this PDF as malicious. The embedded artifact 'embedded_file_obj0014.bin' is the most suspicious IOC.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • ClamAV: Pdf.Exploit.Agent-36836 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36836
  • 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
  • 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/2.5/
    • http://ns.adobe.com/xtd/
    • http://www.xfa.org/schema/xfa-data/1.0/
    • http://ns.adobe.com/xfdf/
    • http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 7

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
04462f810d6eacdacecc9d0a5f3f81bebc722af4415e04da19b520338f642b51		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xD7 67 bytes
embedded_file_obj0009.bin
425aa3a7624fabf0089a7c06a3ed5e0137648fae532758b21845d9cef157e824		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x162 681 bytes
embedded_file_obj0010.bin
e1ab66598406464785df1b7c3e4218452dce39c816aca3e1a181e312cbe8a05c		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x456 93 bytes
embedded_file_obj0011.bin
561c13cf84f87a5adcf1ebd74dbb98fb70846132e5c876b5d917d65339f4d466		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x4FE 483 bytes
embedded_file_obj0012.bin
6dfc2cfc739bf5cd5514e048143c782a1af7b4c86ed10bd88203471efa9b3fe7		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x72C 389 bytes
embedded_file_obj0014.bin
dc4265edc4c34c7bad347d8de3135b057a0f6cf23e35f0f8eb1f4acc46754ce2		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x8FE 40523 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36836
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).
embedded_file_obj0015.bin
51d6d76eddb1746e412f89f4d1c1b0d620c60fb4a5641c018e93871be63968a9		 pdf-embedded-file PDF EmbeddedFile object 15 at offset 0xA793 147 bytes

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