PDF malware analysis — malicious · 059b92af16a70359

MALICIOUS

PDF

16.5 KB

MD5: 256fe74a12ce5a72a0b4cfe8de260b72 SHA-1: 0f2b91799946b3128bb50ff22b420b12333e1883 SHA-256: 059b92af16a7035992c8060afdfffb4f7fa1ea6d48907ea9328fc4312ccd4245

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

This PDF document contains XFA forms with executable JavaScript, indicated by the PDF_XFA_SCRIPT and PDF_UNESCAPE heuristics. The embedded file 'embedded_file_obj0008.bin' is likely the malicious payload. The ML classifier strongly flagged this PDF as malicious. The script's purpose is to execute code, likely downloading and running a second-stage payload.

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 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.
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` `44a215ca169c9c9ee3b7eaa33b82db4e6ed5b79a11e73eb6101fb0fcc3b532b8`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xC6	16179 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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