Malicious PDF / .TXT — malware analysis report

Static analysis result for SHA-256 8a2567240c7727f4…

MALICIOUS

PDF / .TXT

230.6 KB First seen: 2026-05-10
MD5: 22d8db0f1aeeb3fbd60389f874c244a4 SHA-1: d7f712cf4e629a0d632682bd9b2a1b4d5a03212b SHA-256: 8a2567240c7727f4b84f691229da6a9860d1ed8d797474a6bb57d096c82ebec6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains JavaScript actions and XFA form elements, indicating an attempt to execute code. The presence of ASCIIHexDecode filters with exploit indicators further suggests malicious intent. The embedded URLs, while mostly benign, include several related to XFA schemas which could be used in conjunction with the JavaScript to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 6

  • ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX
    Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
  • Suspicious extracted artifact medium 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.
  • 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.
  • 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
  • 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.bitstream.com Referenced by PDF JavaScript
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/xfa/promoted-desc/In PDF document text
    • http://ns.adobe.com/xdp/In PDF document text
    • http://www.xfa.org/schema/xci/2.6/In PDF document text
    • http://www.xfa.org/schema/xfa-template/2.6/In PDF document text
    • http://www.xfa.org/schema/xfa-locale-set/2.7/In PDF document text
    • http://www.xfa.org/schema/xfa-locale-set/2.6/In PDF document text
    • http://www.xfa.org/schema/xfa-form/2.8/In PDF document text
    • http://www.xfa.org/schema/xfa-data/1.0/In PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000049df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x49DF 8084 bytes
SHA-256: e31f8c8507e52f29008d946a00becde9f839e34cb108985ce66167bf881adafa
font_10_sfnt_off00012311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12311 65932 bytes
SHA-256: 422bc5698ba5d9d4818f6a2d8b3abca2f723e713b44a15c390139d2c976a1388
font_11_sfnt_off0001c173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C173 65932 bytes
SHA-256: 7e24ee16c8b09ee74d61445f29c3c0a95abfdf17fc1008606394f159dbd0c106
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Static shellcode analysis found candidate code region(s). Indicators: heap spray 0x41 (A)
font_12_sfnt_off00025fd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x25FD1 65932 bytes
SHA-256: 57e24925bc6bdb98d38e8b4ba3b87f80f75c5e49ea9a522486790d7dc6848549
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Static shellcode analysis found candidate code region(s). Indicators: heap spray 0x41 (A)
font_13_sfnt_off0002fdf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FDF8 65932 bytes
SHA-256: 1f068d668b316fcb46f0801be00137fb749cc7fda5ca15e442829d6c303d8f99
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Static shellcode analysis found candidate code region(s). Indicators: heap spray 0x41 (A)

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