PDF malware analysis — malicious · 9f6eda0ad856caeb

MALICIOUS

PDF

105.6 KB

MD5: d18e802c0eaa1279e17b00f3c3be610b SHA-1: 5ab035771d10709e271a90d11c23fbb7292ba178 SHA-256: 9f6eda0ad856caebb0b18e115578a9c0a88f77877b8bbce0f0be075763eede8f

168 Risk Score

Malware Insights

MITRE ATT&CK

T1059 Command and Scripting Interpreter T1204 Malicious Link

The PDF contains multiple indicators of malicious activity, including XFA forms with executable scripts and embedded files. The 'unescape()' call and 'ASCIIHexDecode' filter suggest obfuscation and potential exploit delivery. The ML classifier strongly indicates maliciousness, and an embedded file was extracted, likely serving as a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 7

XFA form contains risky executable script high CVE related PDF_XFA_SCRIPT

PDF embeds an XFA form whose script block contains exploit, submission/launch, or shell-execution primitives. Ordinary LiveCycle print/update scripts are left as generic XFA/JS signals unless stronger behavior is present.
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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.
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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_obj0008.bin` `e5602a78f41303789123058a82a8cd4fa66846afc093a28c579afeb6b76a1f05`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xE2	15334 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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