PDF malware analysis — malicious · 88514124277e6cc0

MALICIOUS

PDF

103.1 KB

MD5: 6c8170c2310e017d97052bc30d89a904 SHA-1: 93090157d7e060bae476a5cd00987099bce9408c SHA-256: 88514124277e6cc0b514b158ba26b33a3723943321eb74ad6ae624d310e6d036

138 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1027 Obfuscated Files or Information T1566.001 Spearphishing Attachment

The PDF file contains embedded objects and utilizes XFA forms with risky executable scripts, indicated by multiple high and medium severity heuristic firings. The presence of PDF_UNESCAPE and PDF_FILTER_HEX suggests an attempt to decode and execute a malicious payload. The embedded script payload, identified as 'embedded_file_obj0008.bin', is the primary indicator of malicious activity, likely serving as a downloader or initial execution stage for further malware.

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` `ecc7ce958dc1bae12db0ca738b1754af699b2a9fe1673a6394052d94fcca5ba3`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xE2	14974 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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