PDF malware analysis — malicious · c623da6a8358e132

MALICIOUS

PDF

7.1 KB Created: 2014-05-12 14:18:21

MD5: 0fd2e47e1597fdf218a2ab5ef8209560 SHA-1: 5bb967189fe63f7a6637abe072aaa60416d30c0a SHA-256: c623da6a8358e13264ed6264e576fc16a14446c15cfa3758189c08085d136108

68 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file contains an embedded object, flagged as a suspicious extracted artifact and a potential script payload. The ML classifier strongly indicates maliciousness. The embedded file, 'embedded_file_obj0011.bin', is the primary indicator of compromise. The document body text appears to be corrupted or obfuscated, preventing a clear understanding of its lure.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

Embedded script payload in PDF stream medium PDF_EMBEDDED_SCRIPT_PAYLOAD

PDF stream bytes contain an HTML/XFA <script> tag without accompanying Windows shell-execution primitives — common in accessible XFA forms but worth surfacing for analyst review.
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_obj0011.bin` `1c3e7922e968dc71d9ba8d610c90f60b9d07d8c8910a1efea364a772c781a528`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0xFE4	4254 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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