Malicious PDF / .TXT — malware analysis report

Static analysis result for SHA-256 42eda7ac9c7892d0…

MALICIOUS

PDF / .TXT

240.4 KB First seen: 2026-05-10
MD5: 8a15b8fdd5754d921b45544fd6f3f592 SHA-1: 85fac59b29e21fc4e76cc260902956357f06ec81 SHA-256: 42eda7ac9c7892d05a6679193cacfb26d10f9438288ccf87ea57df77bbc056e5
96 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.002 Spearphishing Attachment

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. While no specific family is identified, the techniques used point towards a delivery mechanism for further exploitation, potentially involving embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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_off000070c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70C8 8084 bytes
SHA-256: e31f8c8507e52f29008d946a00becde9f839e34cb108985ce66167bf881adafa
font_10_sfnt_off000149fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149FA 65932 bytes
SHA-256: 422bc5698ba5d9d4818f6a2d8b3abca2f723e713b44a15c390139d2c976a1388
font_11_sfnt_off0001e85c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E85C 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_off000286ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x286BA 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_off000324e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x324E1 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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