PDF malware analysis — malicious · 3c85270d20ba85c3

MALICIOUS

PDF

14.6 KB

MD5: ecc9b84c785d44bcc3442fca346debdd SHA-1: b903d6bf6b9900c23a3f94998f02baa6be5d4645 SHA-256: 3c85270d20ba85c3c416bff8f170aaadb1e29e78f4c6ee073673c592a350577c

180 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF file was flagged as malicious by multiple engines, including ClamAV, and exhibits characteristics of exploiting embedded scripts. The ML classifier also provided a very high confidence score. The embedded script payload is likely responsible for downloading and executing a second-stage payload, as indicated by the 'Pdf.Exploit.Dropped-78' and 'Pdf.Exploit.Agent-36809' detections.

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` `a79097e5b3527969a800a0290d371c8850ead8db242d59695ec43ccb72a49d10`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	14230 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

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