PDF malware analysis — malicious · 3d58879279772a2b

MALICIOUS

PDF

10.4 KB

MD5: 14621dbb02ab40f0949489b9b5b5519e SHA-1: 8d8c1df579f42a29a6cdf7aa6f4fd6e74af3ddbc SHA-256: 3d58879279772a2b9dadcc896e31d028ecd3315e1b6a20ad10334a4fc9d18bbb

108 Risk Score

Malware Insights

MITRE ATT&CK

T1566.003 Spearphishing Attachment T1204.002 Malicious File

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for obfuscated objects and an ML classifier indicating maliciousness. An embedded file was also detected, suggesting a multi-stage attack. The document body contained obfuscated content, further supporting the malicious nature. The primary attack vector appears to be leveraging PDF vulnerabilities to deliver a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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` `b27063c98b12d3367a8299e01a1ff86f1c1c3c04de432efb9f5d1518c86cfd59`	pdf-embedded-file	PDF EmbeddedFile object 1 at offset 0x72	13408 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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