PDF malware analysis — malicious · ed75900e24212c9d

MALICIOUS

PDF

103.8 KB

MD5: 6d94ee1085ea10d86d70cef7b1f4b358 SHA-1: 18becd6278df1616e5486b26b63b986d49525a94 SHA-256: ed75900e24212c9da0f8343701dbf457fbef1f58fcfe3ab031634d2a443f512d

198 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains multiple high and critical heuristic firings related to embedded scripts and potential exploits, including XFA forms with risky executable scripts and the use of unescape functions. ClamAV also detected it as Pdf.Exploit.Dropped-78. An embedded file artifact was extracted, suggesting the PDF is likely a dropper for a second-stage payload.

Heuristics 8

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.
ClamAV: Pdf.Exploit.Dropped-78 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Dropped-78
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` `cd5090b22fd947660cae2b75588805a5fee1f76d8dd1d71cbc9275b12ad6f391`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xE2	15083 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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