PDF malware analysis — malicious · a4c80a2a216a64a9

MALICIOUS

PDF

10.4 KB

MD5: 065b45c94c9f77ed80438f7b41383379 SHA-1: 21f9e07cb86b6a6474e2c1f7e568530827d5adff SHA-256: a4c80a2a216a64a97858d6b8735f62d8af268ae8fb4841853c72b0c5f7f5c4b7

108 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1027 Obfuscated Files or Information

The PDF exhibits high levels of obfuscation, as indicated by the ML classifier and ClamAV detection for 'Heuristics.PDF.ObfuscatedNameObject'. It also contains an embedded file, which is a common delivery mechanism for malware. The document body is heavily obfuscated and unreadable, further supporting the malicious intent. The primary IOC is the name of the embedded file.

Machine Learning

Nyx PDF Classifier malicious score 0.9974

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` `3762f679b903ebaa760b8a7b957414b13daf9d6e4c9b30c587dca02f41d24d5b`	pdf-embedded-file	PDF EmbeddedFile object 1 at offset 0x8C	13408 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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