Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad7c7550f43ce292…

MALICIOUS

PDF

42.4 KB
MD5: 046023095ae0873c4259798dd99ab312 SHA-1: f9216a5e0a99919cec0ca7a113855e9efb175e3e SHA-256: ad7c7550f43ce292ade9539ef508b8da60a52e25eb0c1f34395316badadf6669
226 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1059 Command and Scripting Interpreter T1059.001 Command and Scripting Interpreter: PowerShell T1059.007 Command and Scripting Interpreter: JavaScript

The PDF document contains embedded executable scripts, as indicated by multiple high and critical heuristic firings including PDF_XFA_SCRIPT and ML_NYX_PDF_MALICIOUS. ClamAV detection of 'Pdf.Exploit.Agent-36830' on both the main file and an extracted artifact strongly suggests a known exploit. The embedded script is likely designed to download and execute a second-stage payload, a common technique for delivering malware.

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/
    • 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
0a2224c4023b216235b61c3fc4dd17bbfac1ab23a545687f51b97604cf654712		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xD7 46 bytes
embedded_file_obj0009.bin
74ec7395ec1f0f316990c3715648bf695a49c23a696a1cab164c376546963f90		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x14D 689 bytes
embedded_file_obj0010.bin
65e0cd26724bbac83c6001dfbee5727d8d7dc958f364f02a819dd2cf25ba393a		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x449 160 bytes
embedded_file_obj0011.bin
29e504ce926f5f8a50adfbd1fa3c12a697536c7d2ec76b570c955c7e4a351516		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x534 418 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x721 190 bytes
embedded_file_obj0014.bin
1201d63cd936e8e872a2f268ff448bc5c8708a4164c35554e9540cb0a23792cb		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x82C 40465 bytes
Detection
ClamAV: Pdf.Exploit.Agent-36830
Obfuscation or payload: unlikely
embedded_file_obj0015.bin
03172373f36e220deaea3baf69186e2a8bef99633879227f39b2a0b4510201ee		 pdf-embedded-file PDF EmbeddedFile object 15 at offset 0xA687 138 bytes

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