Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f01e8d170d220fb…

MALICIOUS

PDF

42.7 KB
MD5: 4750c7da9ca78bd7e0e0613c9113eb70 SHA-1: 7c22b5cfdd9c7ab2e23442b19f790cca0fa36dee SHA-256: 5f01e8d170d220fb315eb48fb4fd3f5b01cd97a4dea304f405ec012443c067de
216 Risk Score

Malware Insights

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

This PDF document contains XFA forms and embedded scripts, which are flagged as risky and malicious. ClamAV detection of 'Pdf.Exploit.Agent-36830' on both the main file and an extracted artifact strongly indicates exploitation for client execution. The presence of embedded files and scripts suggests a downloader or exploit dropper functionality, likely delivered via spearphishing.

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 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
0a2224c4023b216235b61c3fc4dd17bbfac1ab23a545687f51b97604cf654712		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xD7 46 bytes
embedded_file_obj0009.bin
8b42403b15b617ca05104fc8535375daa032039b961fdd01b44ff7cf1b57d755		 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
563cf00b5b643cadeabe13c8fb321708c9e1ffec0979538398c4eed0277ce91c		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x534 416 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x71F 190 bytes
embedded_file_obj0014.bin
2a96153fa15c0cb174a078f8368844bbadd0a8a2db764f78f4c0dbc7db249fb7		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x82A 40863 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 0xA813 138 bytes

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