PDF malware analysis — malicious · 93c24ab9b6606946

MALICIOUS

PDF

48.7 KB

MD5: d6dfc58c122b183eff31491d13d43770 SHA-1: d393715151d80ffdcd1e14473ad2f0a57fe71f61 SHA-256: 93c24ab9b6606946cbad091dd1801b3d9b8966b5b1870a0664eb2dd3ffb74478

76 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript and uses ASCIIHexDecode filters, indicating malicious intent. The ML classifier strongly flags this PDF as malicious. The embedded JavaScript stream (javascript_obj0012_000.js) likely downloads and executes a second-stage payload, as suggested by the 'ML_NYX_PDF_MALICIOUS' heuristic and the presence of a large extracted file stream (stream_003_off00009a4b.bin).

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 5

ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
JavaScript action low 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.
XFA form low PDF_XFA

PDF uses XML Forms Architecture — can contain script logic
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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0012_000.js` `b4edd337e8cebbbd125390cfdcf1caae37afb430b22ec8bc6411ad31630c3d92`	pdf-javascript-stream	PDF /JS object 12 at offset 0x9403	542 bytes
`stream_002_off00009624.bin` `070732b3fbbd20295c5b1a911789c30af5b99ce5e14e004bbedc5acf7f113122`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x9624	449 bytes
`stream_003_off00009a4b.bin` `e2563aa16690796f8c55ebc32a22f13a4535054e2e9db703d82b3e33b816bd14`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x9A4B	14548 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`font_00_sfnt_off00000339.bin` `4e56128afad897c8ba22338709048333a61f0c1c8de4785f90267c2edf4d9a4e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x339	58553 bytes

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