PDF malware analysis — malicious · 3d5a8ff541fc437f

MALICIOUS

PDF

105.5 KB

MD5: 7f52a502785db42c7f2de4aa689928f5 SHA-1: cc5d1f8b64dd8be3b36ffbdb9e2bc46e78a26c6b SHA-256: 3d5a8ff541fc437f5ec0a1e4d48151c2d7cb63749da6f62e33aebe17b16702d1

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1566.002 Spearphishing Attachment

The PDF file contains multiple high-severity heuristic firings related to XFA forms and embedded script payloads. The 'PDF_UNESCAPE' and 'PDF_FILTER_HEX' rules indicate obfuscation techniques commonly used to hide malicious code. An embedded file, 'embedded_file_obj0008.bin', was also extracted, suggesting it contains the secondary payload. The presence of XFA scripts points towards an attack vector designed to execute code upon opening the document.

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` `9609db55c132d2a5118e388574ca866add5d62e061ecbc577a17403a46b236b7`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xE2	15322 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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