PDF malware analysis — malicious · 4c8a389b203264fc

MALICIOUS

PDF

7.5 KB Created: 2014-07-17 16:11:48

MD5: 5ededd6758a0f45e50b67bb3d2aa1443 SHA-1: aecaa6713dd996c09725e7c6084350c68d599f41 SHA-256: 4c8a389b203264fc56c68d82944950a1244d5b008603ae37e806a2c295816ba5

68 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file was flagged by a machine learning classifier as highly malicious. Static analysis revealed embedded content, including a script payload, which is a common technique for delivering secondary malware. The presence of an embedded file further supports the likelihood of a malicious payload delivery.

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` `2ba4ebe530903ce05963f6c343ddd28aeed6a201e8cb001501d1238b942bd842`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x118A	4341 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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