Malicious PDF — malware analysis report

Static analysis result for SHA-256 27a871e3d1566225…

MALICIOUS

PDF

42.6 KB
MD5: aa8d93a64b522a88b7220a766b0df354 SHA-1: ae76591b345542b462f1ab0ad5695950527260e5 SHA-256: 27a871e3d15662253d28f896cb82373fd6f06935e9b6ee14f0f385bfdb270b02
226 Risk Score

Malware Insights

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

The PDF file contains embedded executable scripts and is flagged by multiple heuristics, including critical ClamAV detections for 'Pdf.Exploit.Agent-36830'. The presence of XFA forms with risky executable scripts indicates an attempt to exploit PDF viewer vulnerabilities. The embedded artifact 'embedded_file_obj0014.bin' is likely the delivered payload.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • XFA form contains risky executable script high CVE related PDF_XFA_SCRIPT
    PDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
  • 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/xci/1.0/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin
0a2224c4023b216235b61c3fc4dd17bbfac1ab23a545687f51b97604cf654712		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xD7 46 bytes
embedded_file_obj0009.bin
913386fd3e2d94a92139b3f2c95b4b02be956aa095b964683c8534a86b88d61f		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x14D 689 bytes
embedded_file_obj0010.bin
de913a067c1e5a47831f1eba0ee72b663ccd0a38727b4b1cba1f8d6e7ca84cda		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x449 165 bytes
embedded_file_obj0011.bin
a6590813288c35ffa8bbc1b0dc77bbf416b335be07eb687ff4a0f723a20b635e		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x539 416 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x724 190 bytes
embedded_file_obj0014.bin
6e57f18f1eda02ed2f79d2beaf80842a81f0f4b0f4acfa68a042596438bf0b53		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x82F 40810 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely

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