PDF malware analysis — malicious · 2d9cc8c649129ad5

MALICIOUS

PDF

267.4 KB Created: + Å×}·qQ¼EûªG©°7q

MD5: 717e79613f69562219b712a74c60469e SHA-1: acf5c866e83067c21db5caef75f42b50ab17a366 SHA-256: 2d9cc8c649129ad55a8f4ef8764765cd69d67fc26d899ae349ec6d81ef405c09

94 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file is heavily obfuscated and encrypted, with heuristics indicating the presence of JavaScript used to conceal the payload. This suggests a multi-stage attack where the PDF acts as a dropper or initial access vector. The obfuscation and encryption are designed to bypass static analysis, making it difficult to determine the exact nature of the secondary payload without dynamic analysis. The PDF_IMAGE_ONLY_LURE heuristic suggests the document may present a visual lure to trick the user into interacting with the malicious content.

Heuristics 7

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.
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.
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 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
`bxT` `385c32298e33117c4b81f8de50f227acd69a1ca4690971b7d0d94193c7a5cae5`	pdf-embedded-file	PDF EmbeddedFile object 50 at offset 0x3B0E	2376 bytes

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