PDF malware analysis — malicious · c41e837977a527b9

MALICIOUS

PDF

5.2 KB Created: 2012-06-11 17:19:01 Authoring application: vIk

MD5: 0553e241df4eb9f5d2b08fc06a1fd331 SHA-1: 27dbeacb88761b484fb955527c42e9c243b06829 SHA-256: c41e837977a527b9e810d9afe4e09ed0b86bf2063782a9eb4dc65a780e8a9230

70 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged as malicious by an ML classifier with high confidence. It contains an embedded JavaScript file, stream_001_off00000316.js, which is a strong indicator of malicious intent. This embedded script is likely responsible for downloading and executing a second-stage payload, contributing to the overall malicious nature of the document.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

Embedded script payload in PDF stream medium 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.
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
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`stream_001_off00000316.js` `9063aad8d309eb52af7cda79377be772fa200484c2a18e19cdf6e99c0736a640`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x316	61704 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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