PDF malware analysis — malicious · 50e8230f745fe626

MALICIOUS

PDF

18.6 KB

MD5: 22b055707290898270e4b81504f3c39e SHA-1: 89410bf13cc0980f6a3ba83908820ee0d7d8deb9 SHA-256: 50e8230f745fe626671cb64821e169d087c43e27a492bc72f4ab31de4d8ffe81

70 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier with high confidence as malicious. Static analysis revealed an embedded script payload, which is a common technique for delivering secondary malware. The embedded file 'embedded_file_obj0055.bin' is likely the payload. The XFA form and embedded file heuristics further support the malicious nature of this document.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 4

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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0055.bin` `eb0713340133198cb1ba390651531f2a1b718661597e593f459c299dfd9fdd18`	pdf-embedded-file	PDF EmbeddedFile object 55 at offset 0x5C	24936 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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