PDF malware analysis — malicious · 42e2e1bc0d6a055b

MALICIOUS

PDF

48.7 KB

MD5: 257b80a2f15cb726b59056281690be3a SHA-1: 29b4d85bcc653273f4f10fbcde4cc25e753f7012 SHA-256: 42e2e1bc0d6a055b1150090598716a308510d294d750a4daf9a031082aa94b8e

78 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript and is flagged by a machine learning classifier as malicious. The JavaScript stream and a decompressed stream artifact are identified as suspicious. The presence of PDF_JAVASCRIPT and PDF_JS heuristics indicates the execution of embedded scripts, which are commonly used to download and execute further malicious content.

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` `0a4c53e0d6da61dbab0fc16fa66cafd2e0def1813826390b322b51c071149522`	pdf-javascript-stream	PDF /JS object 12 at offset 0x9413	709 bytes
`stream_002_off00009648.bin` `070732b3fbbd20295c5b1a911789c30af5b99ce5e14e004bbedc5acf7f113122`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x9648	449 bytes
`stream_003_off00009a6f.bin` `2edc916ff61593a421e03e7be9faf99d70d44c894093a86656ee486e0524421e`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x9A6F	14572 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`font_00_sfnt_off00000349.bin` `4e56128afad897c8ba22338709048333a61f0c1c8de4785f90267c2edf4d9a4e`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x349	58553 bytes

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