PDF malware analysis — malicious · 42b2327df32e2a05

MALICIOUS

PDF

13.7 KB Created: 2008-12-17 08:26:50

MD5: 3c77b8bfa920fc473b9a61a6308c3f40 SHA-1: 5abc360548cba6d51552f62aa5da36e10928b4b4 SHA-256: 42b2327df32e2a05e2c2e5ae41fa499f06b9be7d36d402a2cd8c5cfb8d865549

136 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1059.001 PowerShell

The PDF file contains embedded JavaScript triggered by an OpenAction, indicating an attempt to exploit vulnerabilities upon opening. The critical heuristic firing for CVE-2008-2992, specifically mentioning 'util.printf', strongly suggests the exploitation of a known Adobe Reader vulnerability. The embedded JavaScript stream and the extracted javascript_obj0006_000.js file further support the execution of malicious code. The primary intent appears to be the exploitation of the reader to run arbitrary code, likely for further payload delivery.

Heuristics 5

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. (matched in decompressed stream)
OpenAction trigger high PDF_OPENACTION

PDF has an /OpenAction — code runs automatically when opened
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `75b1fe4bb487dcec40a0c4f6a56c1acc7bdc23abb3639966d78821f0810d000b`	pdf-javascript-stream	PDF /JS object 6 at offset 0x179	13170 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s).

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