PDF malware analysis — malicious · 760d2f944b5d7327

MALICIOUS

PDF

10.2 KB Created: 2010-06-06 12:37:42 Authoring application: Saqmosiwaneho (via c84daCeyfimewoje)

MD5: 60a9f95c738cfe816fb9e3c433fc79f1 SHA-1: a3a063ac9712f70ecb5b3bba87a4b2e1fec41cd6 SHA-256: 760d2f944b5d73278b4976b89087b61bf48d1aacc00a9aa68f2a26d2911339df

298 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that is XOR-decoded using a page-word-based method. Multiple critical heuristics indicate exploitation of CVE-2009-4324, CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992, all related to PDF JavaScript execution. The primary function of the deobfuscated JavaScript appears to be downloading and executing a secondary payload, as indicated by the 'page_word_xor_stage_000.js' artifact. The document body is heavily obfuscated and does not provide direct clues to the lure.

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)
OpenAction trigger high PDF_OPENACTION

PDF has an /OpenAction — code runs automatically when opened
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_obj0018_000.js` `2e76c23f50f40d730a485a5b4df0a6c1ae4b35f531c235a2f9c0e12351b2e6d7`	pdf-javascript-stream	PDF /JS object 18 at offset 0x1A2A	4192 bytes
`page_word_xor_stage_000.js` `92967d05b7d23457bdba7402c548bef41194b3274206bd604239266a78cc1e74`	deobfuscated-js	page-word XOR decoded JavaScript (decompressed, key=0x05) at offset 0x7BF	3048 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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