PDF malware analysis — malicious · c93adadfd5d5779d

MALICIOUS

PDF

5.1 KB Created: 2011-04-05 23:46:28 Authoring application: bgsfsdffab

MD5: c0e5207939afe22f8053d76e5e6c524f SHA-1: 1188d03f03b757bc6005b1626e1fa0c1dd883b55 SHA-256: c93adadfd5d5779de763ad9bea10dcd5b61feed3a75d4cc243a91c5fdb17d012

70 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains an embedded JavaScript payload, indicated by the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' and 'EXTRACTED_FILE_STATIC_TRIAGE' heuristics. The ML classifier also flagged this PDF as malicious with high confidence. The embedded JavaScript is likely intended to download and execute a second-stage payload. The document body content is not indicative of a specific lure.

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_off00000326.js` `ba560391aef1e2a55cdc7f5eb70084ddf2e6232a3d39d9bb7953501915faab1a`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x326	55122 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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