PDF malware analysis — malicious · 3647e74f65308008

MALICIOUS

PDF

104.4 KB

MD5: bdcee31200405a595321236c7a87ab97 SHA-1: 36f8cc5a15ee86bac5ded2d5cc84cc1bf76641c1 SHA-256: 3647e74f653080081836bbd701c76712edb41975b3add140743e864d86bbb660

228 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1027 Obfuscated Files or Information T1566.001 Spearphishing Attachment

The PDF file contains embedded objects and utilizes XFA forms with risky executable scripts, indicating an attempt to exploit vulnerabilities. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for delivering a second-stage payload. The presence of an embedded file named 'embedded_file_obj0008.bin' is a key indicator of the dropped payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 8

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.
ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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.
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0008.bin` `a0334490c1383f593951db54439eb7b15872396094cd0915373002b360a01c61`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xE2	15167 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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