PDF malware analysis — malicious · 56cdd8fc08f9c9fc

MALICIOUS

PDF

65.7 KB

MD5: 0edf362315e45dd7849b2732b0ff512d SHA-1: f32cde1bc139d9fd2691c3b1c62c404ef165ce4b SHA-256: 56cdd8fc08f9c9fc40674796fea405880211d95c4b677caad1027c700e8ffb7e

150 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.007 JavaScript

The PDF file contains multiple high-severity heuristic firings indicating embedded scripts and an embedded file, strongly suggesting malicious intent. The ML classifier also flagged this PDF with a very high probability of being malicious. The presence of an unescape() call and XFA form with risky executable script points towards an exploit attempt. An embedded file named 'embedded_file_obj0008.bin' was also extracted.

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` `6a51f49259f2d16927c5929a6dd9611fc60a8c8232781fd872f4dfa85113b18b`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xC6	66541 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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