PDF malware analysis — malicious · 91f2e16819339556

MALICIOUS

PDF

68.1 KB

MD5: 45559f0bae7a86221f53bd143a67891c SHA-1: e7628789f333894ff4f32d922f675833e212a93a SHA-256: 91f2e168193395560f6b60e0f0ad1014956b57a3fd0f3ff6e8d1b4ec775bae3d

118 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell

The PDF file contains XFA forms and embedded scripts, indicated by the PDF_XFA_SCRIPT and PDF_EMBEDDED_SCRIPT_PAYLOAD heuristics. The PDF_UNESCAPE heuristic suggests obfuscation is used to hide malicious code. The presence of an embedded file (embedded_file_obj0008.bin) further supports the likelihood of a multi-stage attack. The primary goal appears to be the execution of a secondary payload, likely downloaded from an external source, although no specific URLs for this purpose were extracted.

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
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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://ns.adobe.com/xdp/
- http://www.xfa.org/schema/xfa-template/2.5/
- http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0008.bin` `31be3a7346b15fb3469c8fade2106822c5e021435e6dbbe3860e15b4ffb8655a`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xC6	68995 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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