Malicious PDF — malware analysis report

Static analysis result for SHA-256 008e6325e653eac6…

MALICIOUS

PDF

42.7 KB Authoring application: 179,214,147,147,147,156,178,169,217,184,207,153,178,185,216,203,171,143,186,149,171,143,183,154,171,143,183,143,171,143,175,155,171,143,205,220,171,147,183,203,216,150,215,147,174,169,187,198,154,172, (via 197,143,161,132,215,216,214,195,214,201,212,201,197,216,140,134,167,181,207,174,134,144,132,150,148,148,148,141,159,110,109,109,216,205,202,202,195,200,197,216,197,143,161,132,215,199,211,200,201,159,)
MD5: 38647064071f2da183c285b8c9e09906 SHA-1: e80db6f0a5b500fcfdcc03c028dcb3b6d8cdd777 SHA-256: 008e6325e653eac6eb002a2436bc649f21c22a765a382657efd4350c30dcf676
78 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1059 Command and Scripting Interpreter

The PDF exhibits multiple indicators of maliciousness, including embedded script payloads and embedded files, flagged by both heuristics and an ML classifier. The presence of XFA forms and AcroForm buttons suggests an attempt to interact with the user or trigger actions. While no specific script content is detailed, the embedded nature and heuristic firings strongly indicate a payload delivery mechanism, likely involving the embedded files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • 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
  • AcroForm button with action trigger low PDF_ACROFORM_BUTTON
    PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
  • 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/
    • http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xci/1.0/
    • http://www.xfa.org/schema/xci/2.8/
    • http://www.xfa.org/schema/xfa-template/2.5/
    • http://www.xfa.org/schema/xfa-template/2.2/
    • http://www.xfa.org/schema/xfa-locale-set/2.1/
    • http://www.xfa.org/schema/xfa-data/1.0/

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0031.bin
c06dcd026a7ea0536b63e07ce688691b585339a3ab7ff59065e546b56308c7bb		 pdf-embedded-file PDF EmbeddedFile object 31 at offset 0x8E19 85 bytes
embedded_file_obj0032.bin
9a178fb5a7ee0dfa95a56d18d676e9b6dd3d868e161bf6037bbd08ee7648a36b		 pdf-embedded-file PDF EmbeddedFile object 32 at offset 0x8ECB 1382 bytes
embedded_file_obj0033.bin
2f2b74c5a780522758b525ef777a8395573fce5bf42c87f93d44dd7e0d4eb2cc		 pdf-embedded-file PDF EmbeddedFile object 33 at offset 0x9166 2375 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s).
embedded_file_obj0034.bin
cd9fb4d7d969d11f5f7b17a502bd4b81e09f8e9f1aed37add3b55bbab3610f78		 pdf-embedded-file PDF EmbeddedFile object 34 at offset 0x959A 2276 bytes
embedded_file_obj0035.bin
0daaacc12bba01c01f9be2749f00d4e6a3ecc23490add5146a29dac3a3c0a1ee		 pdf-embedded-file PDF EmbeddedFile object 35 at offset 0x9887 166 bytes
font_00_cff_off00003267.bin
23831e143e2e1a484b95ee765b15d94562c951468b895c080e655667dc04ddf0		 pdf-font-stream PDF embedded font (cff) at offset 0x3267 31178 bytes

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