PDF malware analysis — malicious · 6a111634f65d67d7

MALICIOUS

PDF

14.7 KB

MD5: 140541f8b97a657a79487e32cfe8b527 SHA-1: 805f3fa61799aed53c3e91adac355c37d8f31239 SHA-256: 6a111634f65d67d7a19897d5d70c51c1bd4a6e03d49e5a4b1a4f3a742e784fac

168 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file contains embedded JavaScript, identified by the PDF_EMBEDDED_SCRIPT_PAYLOAD heuristic and confirmed by ClamAV detections (Pdf.Exploit.Dropped-78, Pdf.Exploit.Agent-36809). The embedded script is likely responsible for downloading and executing a secondary malicious payload, a common technique for exploiting PDF vulnerabilities. The ML classifier also strongly indicated maliciousness.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
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.
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://www.xfa.org/schema/xfa-template/2.5/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_pdf_script_00000329.bin` `8391e665e5e790587acc28577a44b51eb4be251868821258f6fff8acc9242dd0`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	14273 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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