PDF malware analysis — malicious · 16c691ad9bae1d30

MALICIOUS

PDF

14.7 KB

MD5: 4d43430c4c0915e5f2915e3501840394 SHA-1: 36a76198985020e6c39ab09b6103794efca0d2af SHA-256: 16c691ad9bae1d30290425cf1ed993b816c0375e8132a822fe73a1f5414b5d6e

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 heuristics and a machine learning classifier, with ClamAV detecting it as Pdf.Exploit.Dropped-78 and an extracted artifact as Pdf.Exploit.Agent-36809. The embedded JavaScript, although truncated, is indicative of an exploit attempting to download and execute a secondary payload, aligning with the T1059.007 (JavaScript) and T1203 (Exploitation for Client Execution) techniques. Given the nature of PDF exploits, T1566.001 (Spearphishing Attachment) is a likely initial access vector.

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` `5d9f1ecdcc6a90f3da660a368b38190d935b1f82ff56821ef6ba443247d11a82`	pdf-embedded-script	PDF raw stream script payload at offset 0x329	14311 bytes
Detection ClamAV: Pdf.Exploit.Agent-36809 Obfuscation or payload: unlikely

Open this report in the interactive analyzer, or submit your own file for analysis.