PDF malware analysis — malicious · b5e43c76cad3987c

MALICIOUS

PDF

9.5 KB

MD5: 8a5da0ba5728f49ba886a7a6a3370df1 SHA-1: ec9f05516356ba93aa9d29a38b32e1fd49af35de SHA-256: b5e43c76cad3987c8ec98549cf6ef73bc712640040d454dd3b0ab4f43c6b00c7

126 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File T1071.001 Web Protocols: Web Protocols

The PDF file contains embedded JavaScript, identified by the PDF_XFA_SCRIPT and PDF_EMBEDDED_SCRIPT_PAYLOAD heuristics. The deobfuscated.js artifact suggests the script is designed to download and execute a second-stage payload. The PDF_EVAL heuristic further indicates the use of potentially malicious JavaScript execution. The confidence is high due to the clear indicators of script execution and payload delivery.

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` `cf1ebebe3657d97716e3a69a53c21d2a5a8df9b35ae4e441939216c63f8776c9`	pdf-embedded-file	PDF EmbeddedFile object 41 at offset 0x52	1162 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`deobfuscated.js` `cfe5f19acd0f1175460768dcdb36b1b3b6c134f87aaf6530ce6597a55cc56cb7`	deobfuscated-js	PDF JavaScript deobfuscation pass	1572 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.