PDF malware analysis — malicious · 4cd680f52ab30e52

MALICIOUS

PDF

2.3 KB

MD5: 0609ff70d6fb45de50c98afd4edeb901 SHA-1: 246229499747e3715ce921595dcbc17964163832 SHA-256: 4cd680f52ab30e52bc5afae1040d033fb26664dbaa698d761314807b17692df8

278 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

This PDF file contains embedded JavaScript triggered by the OpenAction feature, exploiting CVE-2009-0927 and CVE-2008-2992. The JavaScript is obfuscated and uses eval(), indicating it's designed to download and execute a secondary payload. ClamAV detected this as Pdf.Exploit.Agent-35646, further confirming its malicious nature. The extracted JavaScript files, 'javascript_obj0009_000.js' and 'legacy_pdfkit_stage_000.js', are components of this exploit chain.

Heuristics 8

Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927

PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (identified after JavaScript deobfuscation)
util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992

PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (identified after JavaScript deobfuscation)
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
OpenAction trigger high PDF_OPENACTION

PDF has an /OpenAction — code runs automatically when opened
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (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_obj0009_000.js` `c4d0198d53b6f28e0534d6a9805e3b8325e741e89874f37a0a9792dee12a7035`	pdf-javascript-stream	PDF /JS object 9 at offset 0xBC	21118 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `3553cc4fe7bb0e9979404d7ae0342201e6218cb6eaa81e3948b2f5ba68dae6d8`	deobfuscated-js	split-join delimiter stripped JavaScript at offset 0xF7	5761 bytes
Detection ClamAV: Pdf.Exploit.Agent-35646 Obfuscation or payload: likely Carved artifact contains 11 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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