Malicious PDF — malware analysis report

Static analysis result for SHA-256 d78e47f2fe99b812…

MALICIOUS

PDF

222.2 KB Created: 2010-05-07 18:48:03 +02:00 First seen: 2026-05-11
MD5: 9880d28c7b388503189c1a855c28ef17 SHA-1: e720a23bbb9823ca443d3af90f77ad9a36065768 SHA-256: d78e47f2fe99b8125a2a204076e201f7c8a383e0d11aa0b89bd0be30f8dfa365
158 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1071.001 Web Protocols

The PDF contains embedded JavaScript and a SubmitForm action, indicating an attempt to execute code. The embedded URL points to a Google search for 'Tchaikovsky', which is likely a lure to disguise the malicious intent. The JavaScript stream, named stream_000_off00000060.js, is the primary artifact for further analysis, but its content is not detailed here. The overall pattern suggests a phishing or social engineering attack leveraging a seemingly innocuous document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8359

Heuristics 8

  • Embedded Windows executable payload in PDF stream critical PDF_EMBEDDED_PE_PAYLOAD
    PDF stream bytes contain an embedded Windows executable with a verified PE header. Exploit chains often hide droppers inside ordinary streams rather than standard /EmbeddedFile attachments.
  • SubmitForm action medium PDF_SUBMITFORM
    PDF has a /SubmitForm action — form data can be silently posted to an attacker-controlled URL (matched inside decoded stream)
  • 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.
  • 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 1 related finding 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)
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.google.com/[5/7/2010 In PDF document text
    • 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://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://www.google.com/search?q=Tchaikovsky&ct=tchaikovsky10-hp&oi=ddleReferenced by PDF JavaScript
    • http://www.google.com/search)/FS/URLReferenced by PDF JavaScript

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
malware.bin pdf-embedded-file PDF EmbeddedFile object 107 at offset 0x10DEA 4718 bytes
SHA-256: 07702d6aa5719b8015c48038937d941534b51ef61cec043c5f93793d2be2ac63
Detection
ClamAV: No threats found
Obfuscation or payload: likely
actual_type=PE; declared_or_context_type=PDF; filename=malware.bin; kind=pdf-embedded-file
stream_000_off00000060.js decompressed-pdf-stream PDF FlateDecoded stream at offset 0x60 7109 bytes
SHA-256: 59bd7d034efc9caeeff55702df9cb2e409eeb637c1926b388fcb99f3fde8855f
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 long base64-like blob(s).

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