PDF malware analysis — malicious · 5b26152980bd3bf6

MALICIOUS

PDF

14.8 KB

MD5: 72cceabad7094cfd1f52eb9b95391c42 SHA-1: 23f92703478e27e7dfea59a481e3f81e6a031d53 SHA-256: 5b26152980bd3bf62b185e6e00a8d42f9c52e898900b2c70a15bb17a872a542f

168 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF utilizes XFA forms and embedded JavaScript, as indicated by the PDF_XFA and PDF_EMBEDDED_SCRIPT_PAYLOAD heuristics. ClamAV detections confirm its malicious nature, specifically flagging it as an exploit that drops a payload. The embedded script, though truncated, suggests an attempt to execute malicious code, likely leading to the download and execution of a second-stage artifact.

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` `3354f19f9c8e65f0ea252348a83e6d8974e06522acd8102d26af167ea8215a75`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	14392 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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