Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1ebbc8f7ac77299…

MALICIOUS

PDF

43.0 KB
MD5: 1b26832921bf76b33605ca9ea98f15ba SHA-1: 99a3ff488758dc1d9b87d42fe9bdf72d87642b2a SHA-256: a1ebbc8f7ac77299aab7cb13c34df5a76b08e71759e6d0a8423fdd037ab5733c
186 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious File T1204.002 Malicious File: User Execution

The sample is identified as malicious by ClamAV with the signature Pdf.Exploit.Agent-36836, indicating it exploits a known PDF vulnerability. The ML classifier also strongly flags it as malicious. The presence of embedded script payloads and multiple embedded files further supports the malicious nature, suggesting the PDF is designed to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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
  • 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
685ec00ba8d1e3a207e91ad1ae9b8c5e3cbc4f5473feab31f711c3ce0e99d74b		 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
d6b21b1392f7f7ed0b091c6cd37318c7e218ab58d93adb7d5c82ffadc6a25891		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x4FE 415 bytes
embedded_file_obj0012.bin
6dfc2cfc739bf5cd5514e048143c782a1af7b4c86ed10bd88203471efa9b3fe7		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x6E8 389 bytes
embedded_file_obj0014.bin
b9ce4c399289e749c9d1aa5f12145975cfb4dde3e20721601b85b074bb82b5d3		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x8BA 40934 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36836
Obfuscation or payload: unlikely
embedded_file_obj0015.bin
51d6d76eddb1746e412f89f4d1c1b0d620c60fb4a5641c018e93871be63968a9		 pdf-embedded-file PDF EmbeddedFile object 15 at offset 0xA8EA 147 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.