Malicious PDF — malware analysis report

Static analysis result for SHA-256 61b60f8c04b09426…

MALICIOUS

PDF

43.2 KB
MD5: 981ac24845dcb79fddf45e43ce67db22 SHA-1: 17522087fdc8f3d7d7dad8f6d932e7c4fdd3247f SHA-256: 61b60f8c04b0942626a302db186390fa064f2df5bcfa77726bd82e5fbcc87830
176 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains embedded scripts and is flagged by multiple heuristics, including ClamAV detection for 'Pdf.Exploit.Agent-36836'. The presence of embedded files and XFA forms suggests an attempt to exploit vulnerabilities within the PDF reader to execute arbitrary code. The embedded script payload is likely responsible for downloading and executing a secondary stage, though its exact functionality is obscured.

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 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 script payload in PDF stream low 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 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
813932ea92c9da26d2ebeaa7568e8ef3ffdbcf1b00fed5b01a4558e256975198		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x162 683 bytes
embedded_file_obj0010.bin
e1ab66598406464785df1b7c3e4218452dce39c816aca3e1a181e312cbe8a05c		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x458 93 bytes
embedded_file_obj0011.bin
3fc6aa94f510a5569b84161202c387c93a31e4604d6678aa47db51059fa7ed69		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x500 433 bytes
embedded_file_obj0012.bin
6dfc2cfc739bf5cd5514e048143c782a1af7b4c86ed10bd88203471efa9b3fe7		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x6FC 389 bytes
embedded_file_obj0014.bin
ed1581fa479802f70256a8b833f5adde4ed7caf4c91f68926e1098132bfef07d		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x8CE 41112 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 0xA9B0 147 bytes

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