PDF malware analysis — malicious · a75852a972da4dbb

MALICIOUS

PDF

103.3 KB

MD5: 44ad9e6ecd9b4f5f052f1fee1ff29e4f SHA-1: b8ad069861db85e5c8877320e6cd49fa9bcc37e2 SHA-256: a75852a972da4dbbc74ed607dc75817fad4a9590a0a0c1b76008ac321b1feed8

138 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains XFA forms and embedded scripts, indicated by PDF_XFA and PDF_XFA_SCRIPT heuristics. The PDF_UNESCAPE heuristic suggests obfuscated script content. An embedded file, 'embedded_file_obj0008.bin', was also extracted. These elements combined suggest the PDF is designed to execute a script that likely downloads and executes a second-stage payload.

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` `04807d73dd25a6a7c61493affb0966420ccd5cfe47d8c72b26ff5128318a4c9c`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xE2	15010 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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