PDF malware analysis — malicious · e9f98aad614399b8

MALICIOUS

PDF

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

MD5: 9947aebd3620520b12092008cf334728 SHA-1: 6317897ce9185c2e7a5ca236a606e97f64f09f13 SHA-256: e9f98aad614399b8ac6bddb5677fc53fae1fd24c95d488294108a7cf17786a7b

70 Risk Score

Malware Insights

MITRE ATT&CK

T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains an embedded JavaScript payload, indicated by the 'PDF_EMBEDDED_SCRIPT_PAYLOAD' heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The embedded script, named 'stream_001_off00000316.js', is likely responsible for executing the malicious payload. The document body does not provide specific lures, but the presence of an embedded script points towards a delivery mechanism for further malicious activity.

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` `d26db5d88625190e5ea3f193f3eb21bf9902702a4efa8efccaf5dd258bcc5c6a`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x316	55442 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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