PDF malware analysis — malicious · 25417f583cc69f75

MALICIOUS

PDF

105.7 KB

MD5: 68186ec8bf8f233ccb91547e0d91ce9a SHA-1: 863f4d3eefaf34f5c6dedd0978f4d846a1c702e8 SHA-256: 25417f583cc69f7592e9bf60813ad30fc5e3f8b0af98eaadd8a38b3c7f43245c

138 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF sample contains multiple indicators of malicious activity, including embedded files and scripts, and the use of unescape functions and ASCIIHexDecode filters. The presence of XFA forms with executable scripts suggests an attempt to exploit PDF vulnerabilities. The embedded file 'embedded_file_obj0008.bin' is highly suspicious and likely contains a second-stage payload. The lack of specific script content or URLs prevents a more precise attribution or IOC extraction.

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` `fe4495c94d4bb6766f5469e45d1d1c2eebf3d140d83f0d03f2a4258747532092`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xE2	15358 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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