PDF malware analysis — malicious · 9a1456af893299a7

MALICIOUS

PDF

42.2 KB

MD5: c1d9ca870664d94f19e6f5cdb2f0e919 SHA-1: 6076f9faad3be2bc6906dfe270b45d808e44fc78 SHA-256: 9a1456af893299a781dd057968cdd9e5d3640765383a20d7efdcec5689b0419f

108 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF sample contains multiple embedded files and triggers high-severity heuristics for PDF evaluation and embedded script payloads. The ML classifier strongly indicates maliciousness. The presence of an 'eval()' call and embedded script suggests the document is designed to execute arbitrary code, likely to download and run a secondary payload from one of the embedded files.

Machine Learning

Nyx PDF Classifier malicious score 0.9983

Heuristics 6

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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.
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.
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` `984a346671265f638e28c6f18a78a6dac023cc310f32d8ad0ab6a680d4c92579`	pdf-embedded-file	PDF EmbeddedFile object 9 at offset 0x162	781 bytes
`embedded_file_obj0010.bin` `4bf827139d706dab5c6c984e1660e9a4084f31449d250e28f276e186d078c22f`	pdf-embedded-file	PDF EmbeddedFile object 10 at offset 0x4BA	118 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`embedded_file_obj0011.bin` `10cfd9797d950489565ea96fa57ae102b438b2e90c00a8064bb3cfa14c1608f4`	pdf-embedded-file	PDF EmbeddedFile object 11 at offset 0x57B	40896 bytes
`embedded_file_obj0012.bin` `6dfc2cfc739bf5cd5514e048143c782a1af7b4c86ed10bd88203471efa9b3fe7`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0xA586	389 bytes
`embedded_file_obj0014.bin` `9f69c42e66b0c1666412737dc9cf4aa42379ee793c4ad8d07130781756ea33d5`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0xA755	65 bytes
`embedded_file_obj0015.bin` `129e4e726ddafc353e13bd03f15fd4d48ceb50aa28924bc8b406e3be1073b46a`	pdf-embedded-file	PDF EmbeddedFile object 15 at offset 0xA7DC	146 bytes

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