PDF malware analysis — malicious · add1af74fb07f6ca

MALICIOUS

PDF

130.2 KB

MD5: dc63fdd887b1763fb3e564b0f46a632f SHA-1: 1eaf871ccc629aedc1fdde70b3d15837a4325457 SHA-256: add1af74fb07f6ca9f68074fafda7df135cb81afc31d81c8bbc880e34ff457d8

84 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript and an embedded script payload, strongly indicating malicious intent. The ML classifier also flagged this PDF with high confidence. The presence of embedded files, particularly 'embedded_file_obj0004.bin', suggests it may be used to deliver a secondary payload. The specific attack pattern is likely an attempt to exploit PDF vulnerabilities to execute code.

Machine Learning

Nyx PDF Classifier malicious score 0.9915

Heuristics 7

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
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules. (matched inside decoded stream)
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules. (matched inside decoded stream)
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic (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.
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://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/

Extracted artifacts 11

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0001.bin` `f7ee3ef2f8f35d669a6c2b8b0b0ee89655bbc3d04b107a8d22531830f6fc28a1`	pdf-embedded-file	PDF EmbeddedFile object 1 at offset 0xCC4	86 bytes
`embedded_file_obj0002.bin` `7cfe100cbdcad5aca90e1aff8d47bd1123cf26569260667c1d765df6ce0caa2c`	pdf-embedded-file	PDF EmbeddedFile object 2 at offset 0xD77	2016 bytes
`embedded_file_obj0003.bin` `f3af0cf90c00df075a9ce3a70b1ab9f6630be5831085025f0de58661026ef643`	pdf-embedded-file	PDF EmbeddedFile object 3 at offset 0x110B	15837 bytes
`embedded_file_obj0004.bin` `1618be88b77384b7e3d67817b9ec19bbbfc7018d18d3fd54d4daaff288c95aaa`	pdf-embedded-file	PDF EmbeddedFile object 4 at offset 0x1788	11695 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`embedded_file_obj0005.bin` `2680b20f4fac49f509e9b73896071e8d16550d04c32a2854f801644ece0b6d0b`	pdf-embedded-file	PDF EmbeddedFile object 5 at offset 0x1B2A	4852 bytes
`embedded_file_obj0006.bin` `89db6425645c1f2700e52a38498e90ca6ef07071c0662f0b1655e8eb798468ad`	pdf-embedded-file	PDF EmbeddedFile object 6 at offset 0x1F40	1223 bytes
`embedded_file_obj0007.bin` `af05f8185c725a70291567ae2112fa9a98b368528a7cc440552f0c0847d95121`	pdf-embedded-file	PDF EmbeddedFile object 7 at offset 0x218E	85 bytes
`embedded_file_obj0008.bin` `8e2b0c5682a7ef5861af182df1c165bec1368e4ec954c0f525b7d9b0aa94381b`	pdf-embedded-file	PDF EmbeddedFile object 8 at offset 0x223B	332 bytes
`stream_002_off00000339.js` `f574e4d51594d1a8fd22e125b109b827c437aa898edc78babb62dbb93f8744f8`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x339	1532 bytes
`stream_003_off00000524.js` `4a1aca004cf20431c9a66dce85404a6411a54d881a6c257882260ffc972a13eb`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x524	870 bytes
`objstm_0038_00.bin` `fc38668935b818d494502afb894c15e6b0d801951a9c4fd0b0c46f76fef1fb2a`	pdf-objstm-decoded	PDF /ObjStm 38 0 obj (inflated)	689 bytes

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