PDF malware analysis — malicious · a2ec3fac1df49089

MALICIOUS

PDF

12.2 KB

MD5: 2ef3855e89e489e4024cc47d5c23e37a SHA-1: 0ec945a50e0f23d49dce40868ad895d4a06956cb SHA-256: a2ec3fac1df49089daebe27995e563a7aaab623c064598c7a02e97b231ffca06

320 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.001 Malicious Link/Object T1204.002 Malicious File

The PDF file contains embedded JavaScript that leverages multiple known Adobe Reader vulnerabilities (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659, CVE-2008-2992). The JavaScript is obfuscated and appears to be designed to download and execute a second-stage payload. ClamAV also detected this file as Js.Exploit.HTML-28, further indicating malicious intent.

Heuristics 8

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. (identified after JavaScript deobfuscation)
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)
Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (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: Js.Exploit.HTML-28 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Js.Exploit.HTML-28
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_obj0076_000.js` `1073e32ab74d8d26b85646962f908b14223258cb71485155a3848dbbe97b490d`	pdf-javascript-stream	PDF /JS object 76 at offset 0x2C2	11579 bytes
`split_char_table_stage_000.js` `f24e1ac1a5a5b5157ad58d57b4e5c8de858f595148bd20f352bd93f589d4e445`	deobfuscated-js	split character-table join decoded JavaScript at offset 0x2D1	3858 bytes
Detection ClamAV: No threats found 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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