PDF malware analysis — malicious · 83dabca9ec9a5815

MALICIOUS

PDF

21.4 KB

MD5: 1a5f9683e2adc309834d17099d9eb082 SHA-1: 7b2519702fd815cbad4fbc236eaee657545c8310 SHA-256: 83dabca9ec9a5815a49fb885ed3f69339e419ba37047c2d9f42def57d25654ad

138 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF document utilizes XFA forms, which contain embedded JavaScript. The JavaScript is obfuscated and likely intended to download and execute a secondary payload, as indicated by the 'PDF_EVAL' and 'PDF_XFA_SCRIPT' heuristics. The embedded file 'embedded_file_obj0008.bin' is also a strong indicator of a malicious 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.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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` `83d21e0bf90db7c0f7471d7ea068d5c4ca204eb84e3ec08910e74549851227a9`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xC6	21190 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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