Malicious PDF — malware analysis report

Static analysis result for SHA-256 1848929f16ab7ebd…

MALICIOUS

PDF

43.0 KB
MD5: 189681139cf27d7249441603b0855c1d SHA-1: 4dc6b311324e0869460eeab050d1c5d292f38a56 SHA-256: 1848929f16ab7ebd12f3be8f10a906f9808bf7aab7fcb4ed3c19aaf85785d4b1
176 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including ML classification and ClamAV detection, indicating it contains malicious content. The presence of embedded files and XFA forms suggests an attempt to exploit PDF vulnerabilities for code execution. The ClamAV detection name 'Pdf.Exploit.Agent-36834' is included as a primary IOC.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • ClamAV: Pdf.Exploit.Agent-36834 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Agent-36834
  • 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://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
a207f3d6fd038cd7bd9eeea72feef40b85ca8fa36bb88a7fbc0f15c37273c546		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x162 690 bytes
embedded_file_obj0010.bin
1c5b7971dff586207e8235b49916e2677297f244f218ae7d19c6ac9623332af8		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x45F 100 bytes
embedded_file_obj0011.bin
9ccf5a181d991f3c85e96c3259efc60ff6b466c442c794c70d5a07dc91b11707		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x50E 583 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x7A0 190 bytes
embedded_file_obj0014.bin
59c739b9bea3e44193014842ae20a66df5b4e75fb9bd33cc41203c0dda8158eb		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x8AB 40998 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36834
Obfuscation or payload: unlikely
embedded_file_obj0015.bin
03172373f36e220deaea3baf69186e2a8bef99633879227f39b2a0b4510201ee		 pdf-embedded-file PDF EmbeddedFile object 15 at offset 0xA91B 138 bytes

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