PDF malware analysis — malicious · 4d89fc1ff0ba18c6

MALICIOUS

PDF

1.4 KB

MD5: 51ca0305ecb172d0d8dd516ef29841eb SHA-1: 9d0706f9fb1d50da19e7f2a9653a37e461b12054 SHA-256: 4d89fc1ff0ba18c607fd1b6b7edcfecec35550b1f501f50c5224c9e1410fcc03

196 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2009_4324 heuristic suggests exploitation of a known vulnerability in Adobe Reader. The PDF_UNESCAPE heuristic points to obfuscated JavaScript. The ClamAV detection and the presence of JavaScript streams strongly suggest this is a dropper. The extracted file 'javascript_obj111111_000.js' likely contains the malicious script responsible for downloading and executing a secondary payload.

Heuristics 6

media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324

PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009. (matched in decompressed stream)
ClamAV: Pdf.Dropper.Agent-7212361-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7212361-0
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
Suspicious extracted artifact medium 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.
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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111111_000.js` `9d8032983eee82b601363307e761774f59b779f818c1b0a6da52ae83b4790f82`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1268 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`javascript_obj111112_001.js` `0cd99367ff17f9d5c6e37999d8dedb638c267aad8613bbca61e8ff681b792d4a`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x48D	263 bytes

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