PDF malware analysis — malicious · 968a03ab9ef0d4bb

MALICIOUS

PDF

14.9 KB

MD5: c1a97017691e02ac9790e12c8805ce6e SHA-1: 08c62a26a65030e2e64f4c7420fa9bf898f99084 SHA-256: 968a03ab9ef0d4bb85d2f1f463844ee8db7ccc121b16fb089dbe217832d8418b

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution: Malicious-Embedded Application T1566.002 Phishing: Spearphishing Attachment

The PDF contains an embedded script payload, flagged by heuristics and ClamAV as a malicious exploit. The ML classifier also strongly indicated maliciousness. The embedded URL is likely part of the exploit chain, although its reputation is unknown. The primary attack vector appears to be leveraging the embedded script to download and execute a secondary payload.

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.
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.
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://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` `7d220c26a176c3b32f7203c2f6e31d26d5afa694b89f442f3eafa3953cc7c116`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	14480 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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