PDF malware analysis — malicious · bf7183c71687484c

MALICIOUS

PDF

69.1 KB

MD5: e61e69e55382be426c82d320e14e0b9d SHA-1: 8bb9f638f4c7b4d5b9e05dc712fb3d1a7d285367 SHA-256: bf7183c71687484c17d924402ec5bfc9438457528bb2aba39a026bd1e24ee365

150 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 PowerShell

This PDF document exhibits malicious characteristics, including the presence of an embedded file and the use of unescape() calls, indicative of script obfuscation. The ML classifier strongly flagged this sample as malicious. The heuristics suggest the document contains risky executable script within an XFA form, likely intended to exploit a vulnerability or deliver a secondary payload. The embedded file, named 'embedded_file_obj0008.bin', is a primary indicator of malicious intent.

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
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` `3e6a92910bf9cf505916a15f30d70b8330a3bfcb31d423c8be6fe6ad339ca746`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xC6	70073 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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