PDF malware analysis — malicious · 90a6515a7eb9afec

MALICIOUS

PDF

70.5 KB

MD5: 0fff291ffce891d11c8358225b7f8433 SHA-1: d89a5bce28fb9a6bc4cb1aec3a9e2b4e14c18506 SHA-256: 90a6515a7eb9afecc53eacf036d6d19fb8522a3563df12bbaab338187cb0ca8f

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF document contains an XFA form with embedded JavaScript, flagged by multiple high-severity heuristics. The script is obfuscated and likely responsible for executing a malicious payload, as indicated by the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' and 'ML_NYX_PDF_MALICIOUS' firings. The embedded file 'embedded_file_obj0008.bin' is also suspicious. The primary attack vector appears to be leveraging the PDF's scripting capabilities to download and execute additional malware.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 7

XFA form contains risky executable script high CVE related PDF_XFA_SCRIPT

PDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
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.
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
Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
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_file_obj0008.bin` `c78eafbedbeb896b50e7b77a7051c6af5460dc334928a8ea420f764bbe3dd50a`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xC6	71448 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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