PDF malware analysis — malicious · b4011af7101d5f0a

MALICIOUS

PDF

1.4 KB

MD5: c019a0fa9a70c5f59f3e1de401274758 SHA-1: 1a2e45c9b55043792f8c0c9e9de0f0bc9dda94b6 SHA-256: b4011af7101d5f0ab80fbb266a6b9ad4854b6f75c676c7aeac363116b646f84c

178 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious JavaScript T1071.001 Web Protocols: Web Protocols

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 vulnerability related to media playback. The ClamAV detection of Pdf.Dropper.Agent-7294847-0 further confirms its malicious nature. The embedded JavaScript, likely obfuscated, is expected to download and execute a secondary payload, a common technique for dropper malware.

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-7294847-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7294847-0
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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.
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
`javascript_obj111111_000.js` `c82e73ae5f73db1345b60bfb0c226df0ac46724debbc005c6a0ec3bb993f5b6b`	pdf-javascript-stream	PDF /JS object 111111 at offset 0x160	1263 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` `9f13927989add863ffc868bdf53496729f52eb2f4739b278e37f0dee9468fa67`	pdf-javascript-stream	PDF /JS object 111112 at offset 0x484	254 bytes

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