PDF malware analysis — malicious · 0ded58797992f584

MALICIOUS

PDF

14.6 KB

MD5: b289cdaadbe193be15f9139709c0cb64 SHA-1: bc117bef3c9e5beacd29cdb8cf0e5ae0973c69d3 SHA-256: 0ded58797992f584ee30ace713f89d6b10c5916c136ae9b53b1512850ec971e5

168 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The file is identified as malicious by multiple high-confidence heuristics, including ML classification and ClamAV detections (Pdf.Exploit.Dropped-78, Pdf.Exploit.Agent-36809). The presence of XFA forms and an embedded JavaScript payload strongly suggests an exploit targeting PDF vulnerabilities. The embedded script, though truncated, contains obfuscated code that likely attempts to download and execute a secondary payload, a common technique for malware delivery.

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` `017597d4255c7770a4a9a30e2a3f63ebd175465ca8e5e32e1a6b5e67cd907f28`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	14217 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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