Malicious PDF — malware analysis report

Static analysis result for SHA-256 148d22f2067f02bf…

MALICIOUS

PDF

16.5 KB Authoring application: Idqrammn Xeivvtdarchkze First seen: 2026-05-08
MD5: 35683c7bb95f43365c9f0437e2856280 SHA-1: f0f0f9bccc2d8beec81b423a2ede402904c5c461 SHA-256: 148d22f2067f02bfd946d22f1c77fa4f74a3229e96ed6acde2c3cdbdec6bfa00
72 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document contains malformed active content and an embedded script payload, strongly indicating an exploit attempt. The ML classifier flagged it with high confidence. The embedded script likely attempts to download and execute a second-stage payload from the suspicious URL http://www1.simple-scanerjjb.Kwik.To/, which is a common technique for delivering malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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
  • Embedded script payload in PDF stream info 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.
  • 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://www1.simple-scanerjjb.Kwik.To/?y1xty=nZTl2LbY4dKW4c6RsJiYoJyY3t7Otpep2K7UnNClop1mmdfUq5alnKGSqWGqpK2Z1eCtnphemcTD0NevvL6tn6Hh2Lamj%2BCU&quot;;var In PDF document text
    • http://www1.simple-scanerjjb.Kwik.To/?y1xty=nZTl2LbY4dKW4c6RsJiYoJyY3t7Otpep2K7UnNClop1mmdfUq5alnKGSqWGqpK2Z1eCtnphemcTD0NevvL6tn6Hh2Lamj%2BCU&quotIn PDF document text
    • http://ns.adobe.com/xdp/In PDF document text
    • http://www.xfa.org/schema/xci/1.0/In PDF document text
    • http://www.xfa.org/schema/xfa-template/2.5/In PDF document text
    • http://ns.adobe.com/xtd/In PDF document text
    • http://www.xfa.org/schema/xfa-data/1.0/In PDF document text
    • http://ns.adobe.com/xfdf/In PDF document text
    • http://www.xfa.org/schema/xfa-form/2.8/In PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0008.bin pdf-embedded-file PDF EmbeddedFile object 8 at offset 0xA3 15772 bytes
SHA-256: c8b7710fcbf748b542d91010cb9817362efefba4fc49815ef06a53d38ee5e8f9
Detection
ClamAV: No threats found
Obfuscation or payload: likely
116 of 230 identifiers look randomly generated (e.g. 'nZTl2LbY4dKW4c6RsJiYoJyY3t7Otpep2K7UnNCl') — consistent with name-mangling obfuscation. Carved artifact contains 1 long base64-like blob(s).

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