PDF malware analysis — malicious · cc65eca4b272ae7b

MALICIOUS

PDF

103.3 KB

MD5: 5b34fef74177e24bee761745f5877b63 SHA-1: eecd181cb30f2b57552a9dca12b1ed67abdbb8c4 SHA-256: cc65eca4b272ae7b8a72c0d7138edfedfdc026ddcdc5c1678c9189da08e91695

138 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains XFA forms with risky executable scripts, indicated by the PDF_XFA_SCRIPT heuristic. The PDF_UNESCAPE and PDF_FILTER_HEX heuristics suggest obfuscation and potential exploit indicators within the PDF streams. An embedded file, 'embedded_file_obj0008.bin', was also extracted, which is likely the payload. The overall attack pattern involves luring the user into opening a malicious PDF that executes embedded scripts to download and run a secondary 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` `3628d2eaea903eb655830119984428a7e602ebd0aab39e66ff307fb96bef8a3b`	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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