PDF malware analysis — malicious · 54d395994e92f65b

MALICIOUS

PDF

87.8 KB

MD5: f0db1160925bfe26c688b546c1bf737a SHA-1: 774118d0f67a3faa980626eeb5e0d3b30054db38 SHA-256: 54d395994e92f65ba42457b6616ce113379ee908b64da93498b9d9b925b85bc8

300 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File T1190 Exploit Public-Facing Application

This PDF file contains embedded JavaScript that utilizes multiple known exploits (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659, CVE-2008-2992) to bypass defenses. The JavaScript is heavily obfuscated using a character-table stager, indicating an attempt to conceal its true purpose, which is likely to download and execute a secondary malicious payload. The recovered JavaScript stream is substantial, suggesting complex malicious functionality.

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)
Character-table JavaScript eval stager high PDF_JS_CHAR_TABLE_EVAL_STAGER

PDF JavaScript reconstructs an exploit stage by indexing into a small character table, appending hundreds of one-character fragments, joining the array, and evaluating the result. This static fallback fires only after the bounded decoder recovers an exploit-like stage, so it catches this obfuscation even when no single CVE API signature is available.
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` `eeb85d7052eb4d4356b12d4ce6449eeba86ef95131666cfeff78db894b137b41`	pdf-javascript-stream	PDF /JS object 76 at offset 0x3A9	81029 bytes
`char_table_stage_000.js` `8b8b2cc951687d538454701208e7b71b4026a543f3de1e2b28aaa17c3118c4bc`	deobfuscated-js	char-table indexed JavaScript (raw) at offset 0x404	3864 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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