PDF malware analysis — malicious · d1ab1cda5d33c287

MALICIOUS

PDF

105.5 KB

MD5: 72e4934075293e9bb1b24d1bd5173a69 SHA-1: 1717f82d201207cdbd9bff49a0e0d2b00d22d257 SHA-256: d1ab1cda5d33c2872d1ba3d5891ad02644614385917998ae62ded79c06b49b34

138 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains multiple indicators of malicious activity, including XFA forms with executable scripts and embedded files. The presence of `unescape()` calls and ASCIIHexDecode filters suggests obfuscation techniques commonly used to hide malicious code. The primary attack vector appears to be the exploitation of PDF vulnerabilities through an embedded script, likely leading to the execution of the `embedded_file_obj0008.bin` artifact.

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` `2af9c991e5af3b5f10a88c06472b63e3bb26469d02dbd1f0075b8dcf7a49d375`	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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