PDF malware analysis — malicious · 8449ab937df9d0b2

MALICIOUS

PDF

105.6 KB

MD5: 8e00a4570cca36e4983777656c54f83e SHA-1: 70c7dbf57552f82226bf376b644baa7a02da6da6 SHA-256: 8449ab937df9d0b21cb00fa74e6fc941fa9fe60a6e9b190736956f9483715720

138 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious File T1204.002 Malicious File: User Execution T1059 Command and Scripting Interpreter T1059.007 Command and Scripting Interpreter: JavaScript

The PDF file contains multiple indicators of malicious intent, including XFA forms with executable scripts and embedded files. The presence of PDF_UNESCAPE and PDF_FILTER_HEX heuristics suggests attempts to obfuscate or exploit vulnerabilities within the PDF structure. The embedded script payload is likely intended to download and execute a second-stage payload, though its exact function is obscured.

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` `b9b02a70ebec639000b0c7093d77eb648bd5400481d9e5f8045f98a1fb3b67cb`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xE2	15346 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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