PDF malware analysis — malicious · fa77d634395a9144

MALICIOUS

PDF

7.4 KB

MD5: 8e19d09c2bea2f3f5a838470f90d2f5f SHA-1: b597b0e7dbe2e695d08c01c56ea70b126c871023 SHA-256: fa77d634395a9144dd79ba38b362f3c41a69e5da62e9555ba2f26b1c8efd1967

78 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains an XFA form with embedded JavaScript, indicated by the PDF_XFA_SCRIPT and PDF_EMBEDDED_SCRIPT_PAYLOAD heuristics. This script is likely designed to download and execute a second-stage payload. The presence of XFA forms and embedded scripts is a common delivery mechanism for exploits. No specific family could be identified, but the techniques used are consistent with generic malicious PDF documents.

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.
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
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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_off00000e27.js` `6082b49e21869af14bf758c157824e3286e555a86f43c21a45fd5e1cbe7be049`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xE27	14724 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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