PDF malware analysis — malicious · 56bee6d84c9664f6

MALICIOUS

PDF

9.2 KB

MD5: 89a13c6f3705a52a0634506e9d202e3c SHA-1: 24c5b401791aa81e3f7ac4ba4fcddad368367055 SHA-256: 56bee6d84c9664f6e59b412499e493c02a4836d1434783aa829b58efcc76b06e

126 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains heuristics indicating the presence of XFA forms and embedded JavaScript, which are often used to deliver malicious payloads. The deobfuscated.js script was extracted and signals obfuscation, suggesting it is designed to download and execute a second-stage payload. The PDF structure itself is also suspicious, with embedded objects and eval() calls.

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` `083926c310edecbdc17f0755c348b30086cd4c637dac39da558dfdf942bfcc46`	pdf-embedded-file	PDF EmbeddedFile object 41 at offset 0x52	1164 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`deobfuscated.js` `d959104ae4b7a1e6ec538c59cc8f4876128652a876f3fbdc4f609d41d7603089`	deobfuscated-js	PDF JavaScript deobfuscation pass	2089 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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