PDF malware analysis — malicious · 037b4232f80ac44e

MALICIOUS

PDF

70.7 KB

MD5: 04e292d03fcdd0008493602331687b39 SHA-1: 4a12ac8c400d7e70f6e93ca4f01b46c4f2ff21a2 SHA-256: 037b4232f80ac44eba728be20a4d7b2d381017008f8808fbbbb6d2b888420df6

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript and triggers high-severity heuristics for eval() calls and XFA form scripts, indicating malicious code execution. The presence of multiple embedded files, including one flagged as a suspicious extracted artifact with obfuscation indicators, suggests the sample is designed to download and execute a secondary payload. The ML classifier strongly flags this PDF as malicious.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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
Embedded script payload in PDF stream low 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.
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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://ns.adobe.com/xdp/
- http://www.xfa.org/schema/xci/1.0/
- http://www.xfa.org/schema/xfa-template/2.5/
- http://ns.adobe.com/xtd/
- http://www.xfa.org/schema/xfa-data/1.0/
- http://ns.adobe.com/xfdf/
- http://www.xfa.org/schema/xfa-form/2.8/

Extracted artifacts 7

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0008.bin` `04462f810d6eacdacecc9d0a5f3f81bebc722af4415e04da19b520338f642b51`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0xD7	67 bytes
`embedded_file_obj0009.bin` `10524c8841105d398f3e8e8c790bc322eaa76a0f71d67929337ac5d9e1752e52`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x162	815 bytes
`embedded_file_obj0010.bin` `73ec5073804e2a11b9b416ec3d0b60ddf3db9ee1c7dbbd9d2aa922ca62c8163d`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x4DC	80 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`embedded_file_obj0011.bin` `b2c774cbbe0cea4b5911606d624ca95184a302c17da91140805b0ed1340db783`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x577	69615 bytes
`embedded_file_obj0012.bin` `6dfc2cfc739bf5cd5514e048143c782a1af7b4c86ed10bd88203471efa9b3fe7`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x115B1	389 bytes
`embedded_file_obj0014.bin` `9f69c42e66b0c1666412737dc9cf4aa42379ee793c4ad8d07130781756ea33d5`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x11783	65 bytes
`embedded_file_obj0015.bin` `51d6d76eddb1746e412f89f4d1c1b0d620c60fb4a5641c018e93871be63968a9`	pdf-embedded-file	PDF EmbeddedFile object 15 at offset 0x1180E	147 bytes

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