Malicious PDF — malware analysis report

Static analysis result for SHA-256 43e7dc05a4cdc91e…

MALICIOUS

PDF

42.8 KB
MD5: 98ee907cc16995bdcbee05e0763cab8b SHA-1: aae5d74cd7fcc1c4145b64d674807bccd166ccfb SHA-256: 43e7dc05a4cdc91e9d235b8d52f1fd660c1d9309dd680f6436425acfe690d0a2
186 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File

The PDF file contains embedded scripts and is flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Exploit.Agent-36834'. The ML classifier also strongly indicates maliciousness. The embedded nature and exploit detection suggest the file is designed to deliver a malicious payload upon opening.

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 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
04462f810d6eacdacecc9d0a5f3f81bebc722af4415e04da19b520338f642b51		 pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xD7 67 bytes
embedded_file_obj0009.bin
dcacbad492f68602da0d884d72058805e8478cea2e036b1420eb516a9e366aaf		 pdf-embedded-file PDF EmbeddedFile object 9 at offset 0x162 686 bytes
embedded_file_obj0010.bin
1c5b7971dff586207e8235b49916e2677297f244f218ae7d19c6ac9623332af8		 pdf-embedded-file PDF EmbeddedFile object 10 at offset 0x45B 100 bytes
embedded_file_obj0011.bin
b750467f5451f62383910ca633f2db163e6a10e0a9479403df74f2ceff67a2ef		 pdf-embedded-file PDF EmbeddedFile object 11 at offset 0x50A 592 bytes
embedded_file_obj0012.bin
d2f06f3fc6900856fe613a64a561919c8454dcbe0fdf238fb8b43e07016955ea		 pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x7A5 190 bytes
embedded_file_obj0014.bin
cfc82ee3e15cad7f368f3e691ba41aec68eaa6a3017d45045d9194cfa8272f40		 pdf-embedded-file PDF EmbeddedFile object 14 at offset 0x8B0 40839 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 0xA881 138 bytes

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