PDF malware analysis — malicious · 1dffbab8cd9d32cf

MALICIOUS

PDF

102.9 KB

MD5: 6f98fc84fd5c0d4faf449887236e859d SHA-1: 65c2a5e12dd79c19f42ea36743301b42a0528c02 SHA-256: 1dffbab8cd9d32cfe015fb0a24f6f01a0dc4b7511fdc5aab6036b5432f696ea9

138 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1566.002 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains XFA forms with executable scripts, indicated by high-severity heuristics like PDF_XFA_SCRIPT. The unescape() call and ASCIIHexDecode filter suggest obfuscation and potential exploit delivery. An embedded file, 'embedded_file_obj0008.bin', was also extracted, likely containing the secondary payload. The combination of these factors points to a malicious PDF designed to execute embedded code.

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` `c4860e8fbf9098ae429412d9ba4591330d9d73a92df7a2b134fed8bc85b56bc5`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xE2	14938 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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