PDF malware analysis — malicious · ec5ef5054ce03d71

MALICIOUS

PDF

7.7 KB

MD5: 004d3839fc6b8088d7fb15df29499780 SHA-1: 1258324c29c907afa2a84f3f47e80c9a3c97704b SHA-256: ec5ef5054ce03d717b2fbbedb76b5d81827cb5ea818d499796b939a15b468981

84 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious Link

The PDF file contains embedded JavaScript that is obfuscated and utilizes filters like ASCIIHexDecode. High-confidence heuristics indicate exploitation of CVE-2009-1492 via the getAnnots primitive. The deobfuscated JavaScript likely executes arbitrary code, leading to the malicious verdict.

Heuristics 5

getAnnots — CVE-2009-1492 high CVE exact CVE_2009_1492

PDF JavaScript calls getAnnots() with an exploit-shaped argument (integer-overflow numeric or long string) — CVE-2009-1492 affects Adobe Reader's annotation handling and allows memory corruption. (identified after static deobfuscation)
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.
syncAnnotScan annotation-staging primitive low PDF_FOXIT_SYNCANNOTSCAN

PDF JavaScript calls syncAnnotScan() — a no-op annotation-enumeration primitive used by exploit-kit JavaScript to stage payload reads from annotation /Subject fields before eval(). Not a vulnerable sink itself; rarely seen in legitimate PDFs.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `65e6cc05a19eb53c2156c3d9f65721f01f3c6472dfb42e9210850a28d9f6f257`	pdf-javascript-stream	PDF /JS object 7 at offset 0x280	120 bytes
`deobfuscated.js` `a90469ff94392b5fdbcd93f6b0a3dd4bbd95d4603c6f1f1ca4294f223d61690a`	deobfuscated-js	PDF JavaScript deobfuscation pass	2679 bytes

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