PDF malware analysis — malicious · 4b822dd7009597d8

MALICIOUS

PDF

11.7 KB

MD5: 1f93e300c2ae71a286a5c0ad4165171e SHA-1: 4bb8c36a791a794508ec53db1d0c815a717b3026 SHA-256: 4b822dd7009597d8f27ca1577cc8520dc89051fa19570d88c12def029e8d1042

128 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.001 Spearphishing Attachment

The PDF sample was flagged by multiple heuristics as malicious, including ML classification and ClamAV detection (Pdf.Exploit.Dropped-78). It contains an embedded script payload and an embedded file, indicating it's designed to drop and execute a secondary payload. The embedded file 'embedded_file_obj0008.bin' is the primary artifact of interest.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
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
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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://ns.adobe.com/xdp/
- http://www.xfa.org/schema/xfa-template/2.5/
- http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0008.bin` `80fc9caf0e534b1b771662483df1705b08b2b81881b21bc9f89051aaa68864b3`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xC8	11217 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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