PDF malware analysis — malicious · bb16ab52691be87b

MALICIOUS

PDF

10.4 KB

MD5: e8b5e81410c15aba3c9f0bc40e3164a9 SHA-1: 696d3ab85ba00cd5f3c1dd31bf97631de1b95459 SHA-256: bb16ab52691be87bf5ae8927b5fc7d2573dd8cef6f30fccba1b5ab720d52b8b2

110 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1027 Obfuscated Files or Information

The PDF was flagged by multiple heuristics, including ML classification and ClamAV, for being malicious and obfuscated. An embedded file was also detected, which is a common delivery mechanism for malware. The ML classifier output of 0.999034 indicates a very high likelihood of maliciousness. The embedded file, named 'embedded_file_obj0001.bin', is the primary IOC.

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` `fdbc38bfdf082ae6647a359b6d16278824efebd9abc95bd86b1a05f9fc0384a8`	pdf-embedded-file	PDF EmbeddedFile object 1 at offset 0x82	13408 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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