PDF malware analysis — malicious · 96c05b05816108dc

MALICIOUS

PDF

9.3 KB

MD5: 57602e83137d80261c9c8e763f5f524b SHA-1: 7e4d15948db42f19a0d4ea85f5183d88472a9127 SHA-256: 96c05b05816108dce1b66a3a2ab9d47b2a97c3abf82e44ba358173e1fd31dda3

126 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains XFA forms with embedded JavaScript, indicated by the PDF_XFA_SCRIPT and PDF_EVAL heuristics. The deobfuscated.js file extracted from the PDF likely contains malicious code designed to execute a payload. The presence of embedded files and script payloads suggests a downloader or dropper functionality. The exact intent of the script is not fully clear due to potential obfuscation, but it is highly likely to be involved in fetching and executing further malicious content.

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` `a56d99a97daea6f098c3cd208c8b0bc5799df3ada8c5b7b0ccb0447c1e9a6cc2`	pdf-embedded-file	PDF EmbeddedFile object 41 at offset 0x52	1160 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`deobfuscated.js` `64a590e446a82dc6a8597305b5ecdafadf15e933221b155d14bf20615cb675f4`	deobfuscated-js	PDF JavaScript deobfuscation pass	1343 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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