PDF malware analysis — malicious · 7d2c5572455bbc9c

MALICIOUS

PDF

103.3 KB

MD5: cfbef87fbfd3cd10b87d95aad18d2715 SHA-1: 390079d0c9861c5cc3d3a223ca1c091934b5d3a0 SHA-256: 7d2c5572455bbc9c3e78b343628307b693de67bc20f21879b2aec0e2e25a65ff

168 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious File T1204.002 Malicious File: User Execution: Malicious Attachment T1059 Command and Scripting Interpreter T1059.001 Command and Scripting Interpreter: PowerShell T1059.007 Command and Scripting Interpreter: JavaScript

The PDF exhibits multiple high-severity indicators of maliciousness, including the presence of risky executable scripts within an XFA form and the use of PDF unescaping, suggesting an attempt to conceal malicious content. The ML classifier strongly flags this PDF as malicious. The embedded file, 'embedded_file_obj0008.bin', is likely the secondary payload delivered by the PDF.

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` `0d3d02966535503ebd22858b83b0801af8f8d9286b87e7e8c58baefdfdde98be`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xE2	14998 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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