PDF malware analysis — malicious · d5a4e074e50da0c6

MALICIOUS

PDF

9.5 KB

MD5: 090393b86cb33910ad3f0358fe3d7d8c SHA-1: e89d3a5ddc6d655a63e4564c032d2bbfb0b5663c SHA-256: d5a4e074e50da0c6ff6aec6067a7d640d468090260d5d8d5627bc336970d8b52

156 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 Scripting: JavaScript T1204.002 Malicious File: Malicious JavaScript

This PDF file was flagged as malicious by an ML classifier with high confidence. It contains XFA forms and embedded JavaScript, indicated by the PDF_XFA_SCRIPT and PDF_EMBEDDED_SCRIPT_PAYLOAD heuristics. The deobfuscated.js artifact suggests the script's purpose is to download and execute a second-stage payload. The exact nature of the payload and its ultimate destination could not be determined from the available evidence.

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.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0041.bin` `cdf1f9094d682bb7f86dcb1611e5139eedb37aa9f3a51a59b2a80925c4f24a7e`	pdf-embedded-file	PDF EmbeddedFile object 41 at offset 0x52	1161 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`deobfuscated.js` `34e8b3166e5b5c1e9b38aed30e7d0fa02f96b67e8756d0b123a4aee183b90945`	deobfuscated-js	PDF JavaScript deobfuscation pass	1339 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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