PDF malware analysis — malicious · 1f21510996afd72a

MALICIOUS

PDF

4.1 KB

MD5: 831809cbc944f84b7f0f48c94dc656f7 SHA-1: 336d94fd1f6ddd70af13b848ffc69744ef7f4596 SHA-256: 1f21510996afd72a262e334ee2896baf0f530cb860585e7615182fa0ffdf7143

110 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains XFA forms with embedded JavaScript, indicated by the PDF_XFA and PDF_EMBEDDED_SCRIPT_PAYLOAD heuristics. The embedded JavaScript, extracted as 'stream_000_off0000027f.js', is likely responsible for executing a malicious payload. The PDF_EVAL heuristic further suggests the use of eval() calls within the script, pointing towards obfuscation or dynamic code execution. The primary attack pattern involves luring the user into opening a document that triggers script execution, leading to a potential compromise.

Heuristics 5

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.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (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.
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
`stream_000_off0000027f.js` `e53ed78b120d828574fca54df3225b911929baba337dda8a3be5178da596bc6b`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x27F	10329 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).

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