PDF malware analysis — malicious · efeac3e909e44b12

MALICIOUS

PDF

2.3 KB

MD5: fc8f814659fecba7848dc7480f633c42 SHA-1: 8a96007feca80e8b3285a745dca2f41b32acd4b0 SHA-256: efeac3e909e44b1260232a6443edc58651e9824f6709887054f0bce75018b626

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple PDF_JAVASCRIPT and PDF_JS heuristic firings. A critical CVE_2008_2992 alert suggests exploitation of a known vulnerability. The embedded JavaScript, particularly the unescaped content, is likely responsible for downloading and executing a secondary payload. The presence of a suspicious extracted file named 'javascript_obj263984_000.js' further supports this. The specific exploit used is identified as CVE-2008-2992.

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)
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj263984_000.js` `6cfeb698def1d65e45e428b8028aa761dbd02e71540febd6a7f55d9c85761c5f`	pdf-javascript-stream	PDF /JS object 263984 at offset 0x197	6922 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 10 eval/decoder/string-building token(s). Carved artifact contains 3 long base64-like blob(s).
`javascript_obj263985_001.js` `d0e1cad5162e6f230b9639ad6fde107f3357dcdb630609e2ffd2c829329d99ac`	pdf-javascript-stream	PDF /JS object 263985 at offset 0x6B6	154 bytes
`javascript_obj263986_002.js` `c9902744cdffd223e588ebedf72cacd795c043ad0818314b18b99df075e833da`	pdf-javascript-stream	PDF /JS object 263986 at offset 0x787	519 bytes

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