PDF malware analysis — malicious · 957c83fd8f76f4dd

MALICIOUS

PDF

10.4 KB

MD5: ac5ceba134f945ba1d702dcb57e46f20 SHA-1: 729d45588718874649240893d9fa75031005d85e SHA-256: 957c83fd8f76f4dd1dc78efdf7507b8d81914c34c4dd7860c1ce34f69ddb594a

108 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.001 Spearphishing Attachment T1027 Obfuscated Files or Information

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for obfuscated objects and an ML classifier indicating maliciousness. The presence of an embedded file, 'embedded_file_obj0001.bin', further suggests a malicious payload delivery. The document body contains obfuscated strings and what appear to be XFA form elements, which are often used to hide malicious scripts or exploit code. The overall pattern points to a downloader or dropper.

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` `a117663d9b24598c9df9e8a5b4bbfe890631612786385f87db58d852d7107ede`	pdf-embedded-file	PDF EmbeddedFile object 1 at offset 0x84	13408 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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