PDF malware analysis — malicious · 277ec121d8cac601

MALICIOUS

PDF

10.5 KB Authoring application: Lgynarztyfs Tqjflvodrzqk

MD5: 31ffb0b40f427393eddbfe3d7cc3c035 SHA-1: 28c174045416c669d41136b94a52ab9134e069d1 SHA-256: 277ec121d8cac6012c180ddcfe506a216b7b5b0319a2e0d2860b0347cd609563

68 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious File T1204.002 Malicious File: User Execution: Malicious Attachment

The PDF file contains an embedded script payload and an embedded file, both flagged as suspicious. The ML classifier strongly indicates malicious intent. The embedded file, 'embedded_file_obj0008.bin', is likely the secondary payload. No specific family could be identified due to the lack of clear indicators in the limited document body text and the absence of script content.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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/xci/1.0/
- http://www.xfa.org/schema/xfa-template/2.5/
- http://ns.adobe.com/xtd/
- http://www.xfa.org/schema/xfa-data/1.0/
- http://ns.adobe.com/xfdf/
- http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0008.bin` `af4f8c8f71b30de5bf190d235b03633a7d6b49acf40300d042b5c0b34a0b4d7f`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0x249	9650 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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