PDF malware analysis — malicious · 1be52e67a45e3758

MALICIOUS

PDF

10.4 KB

MD5: f9e05f1e739951daf533cf5f68ae545a SHA-1: c22c10106de682d9cdf9a35cceb8b8505cfaa1a5 SHA-256: 1be52e67a45e3758bf434b561f8d07c4d648c7a50e2f12e58f839e5c26ab68c3

108 Risk Score

Malware Insights

MITRE ATT&CK

T1566.003 Spearphishing Attachment T1204.002 Malicious File

The file is a PDF document flagged by ClamAV as obfuscated and by a machine learning classifier as malicious. It contains an embedded file, which is a common technique for delivering secondary payloads. The document body is heavily obfuscated and unreadable, providing no direct clues about its intent. The presence of an embedded file suggests an attempt to exploit a PDF vulnerability or trick the user into opening a malicious attachment.

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` `bd3a72a6370468b1320fb4c493885eaf5ab9247c193c1767e48bce40982e86ff`	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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