PDF malware analysis — malicious · 9b1c806d2084191a

MALICIOUS

PDF

65.9 KB

MD5: d1c0d1a2dbb5f1656eb250164f137f5c SHA-1: 1a647a7e5a9cfb6e39f6454e51743187bee0dc1d SHA-256: 9b1c806d2084191a861d84f845412e8522ba527dea5459fa898a9ecd6555b482

148 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution T1059.007 JavaScript/VBScript

The PDF contains embedded scripts and an embedded file, indicated by multiple PDF-specific heuristics. The presence of an unescape() call and XFA form with risky executable script suggests an attempt to obfuscate and execute malicious code. The ML classifier strongly flags this PDF as malicious. The embedded file 'embedded_file_obj0008.bin' is a primary indicator of malicious content.

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` `dc5e43754059e0ad0108788e45d2685b8cb8f32b22166cd26b37e4e79acab5cf`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xC6	66737 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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