PDF malware analysis — malicious · d7076584a69ef2a4

MALICIOUS

PDF

9.3 KB

MD5: 219ff1a304d6b38c2d6e670299fb4ef1 SHA-1: 720b06f30476612b8a0327d1f91888d190741113 SHA-256: d7076584a69ef2a4c170d882cb27798b4d574e5d5a0538f7026464857f81b08a

158 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF file was flagged as malicious by an ML classifier with high confidence. It contains XFA forms with risky executable scripts, including JavaScript. The deobfuscated.js artifact suggests the script is designed to download and execute a second-stage payload. The presence of PDF_EVAL and PDF_FROMCHARCODE heuristics further indicates obfuscated script execution within the PDF.

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 (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` `4ddb5dbab558e1faf52ec16387ce6b98881a65bcd3f20fda2c24f5220620dbe4`	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` `179d5dab3688d0cced0fe1b43fb9566b23a2c15bcf02ba2c873a34a36e9a55a9`	deobfuscated-js	PDF JavaScript deobfuscation pass	1346 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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