PDF malware analysis — malicious · e799bfba4400c293

MALICIOUS

PDF

11.8 KB

MD5: 9d8c051c6c8a8faa57a536520dc0d41c SHA-1: d38927c391d758a9d34f57851d4b2f7f82091cf1 SHA-256: e799bfba4400c29378b5e4fef47edbc8a822d8ffc6acf60d2cb5a0df85699c22

128 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically 'Pdf.Exploit.Dropped-78'. Static analysis revealed an embedded script payload and an embedded file, indicating the PDF is likely a dropper. The embedded file 'embedded_file_obj0008.bin' is the primary artifact of interest for further analysis.

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` `1a55a51fc601e96943bde4152fcb859025c5c3036c5199814ee29679b4621725`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xC8	11312 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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