PDF malware analysis — malicious · c4d1e3219d8b726e

MALICIOUS

PDF

105.6 KB

MD5: 9335c1660a89a20ab5cced2c350401be SHA-1: 4e1252962e3be474d78baaa70a4d0cb1a63d2588 SHA-256: c4d1e3219d8b726e79d808f38ee102f008389049d505840201994a7b51f0fac0

138 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1027 Obfuscated Files or Information T1059.007 JavaScript/VBScript

The PDF contains multiple indicators of malicious intent, including embedded files and scripts, and the use of unescape and hex decoding filters. The presence of an XFA form with risky executable script suggests an attempt to execute code. The primary attack vector appears to be exploiting PDF vulnerabilities to deliver a secondary payload, indicated by the embedded file.

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` `c17d836e2981e025684dcf852cc19c5148b524c9165b52262a7c41b7a77733ef`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xE2	15346 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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