PDF malware analysis — malicious · 2ea91e9f7b719c23

MALICIOUS

PDF

93.5 KB Created: 6,cszEÏ Æ&¤* Authoring application: 4FkEÑ

MD5: 294ab36503105a7b9b865e3f1ebae18d SHA-1: a396601d1ce08dde88a75a91336b029b9186dac7 SHA-256: 2ea91e9f7b719c23b66fa7cb24b13acc00f496970358a6078dbdb91d8769aef6

60 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1566.001 Spearphishing Attachment T1027 Obfuscated Files or Information

The PDF file contains embedded JavaScript and is encrypted, with the encryption specifically noted to be tied to JavaScript execution. This suggests the script is used to obfuscate or protect the malicious payload, likely for delivery to the user. The 'PDF_IMAGE_ONLY_LURE' heuristic indicates the document may be designed to appear as a benign image-based document to trick the user into interacting with it.

Machine Learning

Nyx PDF Classifier suspicious score 0.2975

Heuristics 4

Encrypted PDF carries /JavaScript — payload hidden from static analysis high PDF_ENCRYPTED_WITH_JS

PDF declares /Encrypt and also references an executable trigger (/JavaScript). Document encryption hides the JavaScript body and stream contents from static scanners — combined with auto-execution indicators this is a known evasion pattern used to deliver weaponised JavaScript that the analyst cannot inspect without the decryption key.
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.
PDF paints image(s) but contains no text operators info PDF_IMAGE_ONLY_LURE

PDF has 2 image XObject(s) and the content stream contains no text-emitting operators (BT/ET, Tj, TJ, ', ") in either raw bytes or decompressed streams — this is the screenshot-as-PDF pattern used to bypass text-based scanners and to deliver instructions purely through rendered pixels. It is informational unless paired with invisible links or risky URI context.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00010393.bin` `07e714acb98200d8ce9edb339e8183115c472371c7eeb037a0d3e9e303b8513b`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10393	15744 bytes

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