PDF malware analysis — malicious · 872c0477366339c2

MALICIOUS

PDF

42.6 KB

MD5: d2b99519bd7d59858dbcdfe5a4a42308 SHA-1: a8b992e6bbba251904632485d4d0b1d459e43269 SHA-256: 872c0477366339c25aedacad2afa1fa01e98b60e7b99f9ff9ff4d2ac6eb62b34

186 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged as malicious by multiple engines, including ClamAV with the signature 'Pdf.Exploit.Agent-36830'. High confidence is derived from the ML classifier output (0.999995) and critical heuristic firings indicating an embedded script payload and an extracted artifact also detected as malware. The presence of XFA forms and embedded files suggests a complex attack vector. The specific intent of the embedded script is unclear due to obfuscation, but it is likely to download and execute a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

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/xfa-template/2.5/
- http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0008.bin` `6cac1572f578e298f4df87510195594fec882a8c245ae46d3f89f4582ef5bb5d`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xC6	42889 bytes
Detection ClamAV: Pdf.Exploit.Agent-36830 Obfuscation or payload: unlikely

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