PDF malware analysis — malicious · b28a78f3ae8df641

MALICIOUS

PDF

10.5 KB

MD5: 1e38c1f2394cfa62b9465d1e85f3c93d SHA-1: 36a13d13271abe0ec42e671be374d944e746d4b1 SHA-256: b28a78f3ae8df6411e18e6ca4d74bcd78e13dc99256afc691d053c9fe141b253

108 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF was flagged by a machine learning classifier and ClamAV for being obfuscated and containing an embedded file. The embedded file, 'embedded_file_obj0001.bin', is highly suspicious and indicates a likely attempt to deliver a secondary payload. The XFA form and embedded file heuristics further support the malicious nature of this document.

Machine Learning

Nyx PDF Classifier malicious score 0.9989

Heuristics 4

ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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_obj0001.bin` `0754fa6d8abdfdbba4441436db95c2d37ac4702442603581aa6adcbf97eeb4c1`	pdf-embedded-file	PDF EmbeddedFile object 1 at offset 0x86	13408 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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