PDF malware analysis — malicious · ef0f2f15caa8e9b3

MALICIOUS

PDF

7.2 KB

MD5: 87774510c0c7d531612f6d3051231a63 SHA-1: c742606cda111c7a686615bef029186096227a06 SHA-256: ef0f2f15caa8e9b319fd16a83290c83dd78dd0c49289ab5a3482f8a6c5db7fde

106 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File T1140 Deobfuscate/Decode Files or Information

The PDF contains embedded JavaScript and a Flash object, both flagged as suspicious. The JavaScript stream, named 'javascript_obj0017_000.js', appears to use unescape() and heap manipulation techniques, suggesting an attempt to obfuscate malicious code. The embedded 'exploit.swf' file further indicates an exploit attempt. The primary function of the script is likely to download and execute a second-stage payload, leveraging the embedded exploit.

Heuristics 6

RichMedia (Flash) high PDF_RICHMEDIA

PDF contains /RichMedia (Adobe Flash) which is a historic exploit vector
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
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
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`exploit.swf` `cb7af0e67e2a0a76b8e50dd10996c7312a378dc5589bba1b97edfe55b7ea61cc`	pdf-embedded-file	PDF EmbeddedFile object 14 at offset 0x4D4	3764 bytes
`javascript_obj0017_000.js` `8bb72edfd76c83353fe8757b0a04c58de346ee2731911218acce0c3a0e651d4f`	pdf-javascript-stream	PDF /JS object 17 at offset 0x143C	1697 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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