PDF malware analysis — malicious · 17ce908cb5b2831c

MALICIOUS

PDF

24.4 KB

MD5: 139ce3e76fb1b5d1402afc73e11141f3 SHA-1: dd9d37efd0dd8febbc8a1e73f9c0ef89c6fa52ef SHA-256: 17ce908cb5b2831c7c586666502daa34b05d492f939361a411e0f16bd854c853

176 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The file was detected as malicious by ClamAV with the signature Pdf.Exploit.Agent-36830, and an ML classifier also flagged it with high confidence. The embedded JavaScript attempts to download and execute a second-stage payload, as indicated by the obfuscated string concatenation and the use of 'eval' (e.g., 'eval(ss)' and 'eval(sy)'). The script reconstructs a URL from concatenated strings, which is then used to fetch and execute further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9979

Heuristics 6

ClamAV: Pdf.Exploit.Agent-36830 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36830
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 file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
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://ns.adobe.com/xdp/
- http://www.xfa.org/schema/xfa-template/2.5/
- http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_pdf_script_000003b7.bin` `53e20177e2e45a72227020b9c8c4948c52be65a7b93ce64f6020ac901881e585`	pdf-embedded-script	PDF decompressed stream script payload at offset 0x3B7	24956 bytes
Detection ClamAV: Pdf.Exploit.Agent-36830 Obfuscation or payload: unlikely

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