PDF malware analysis — malicious · a3fd6c7bca9c43ec

MALICIOUS

PDF

9.4 KB Authoring application: Suekikiqinetoro (via 3fccfVbliuipipowi)

MD5: 87f669fdc3d04b784c6d0396c32cee68 SHA-1: 9b07f3effee2ac727e85dd1310efa0526eae1299 SHA-256: a3fd6c7bca9c43ece3ca327e543272d33a2344dd7028980f5eacc3eb5fd11cc2

338 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious Link

This PDF file contains embedded JavaScript that is obfuscated and triggered via an OpenAction. The heuristics indicate exploitation of multiple CVEs (CVE_2009_4324, CVE_2009_0927, CVE_2007_5659, CVE_2008_2992) related to JavaScript execution within PDF documents. The deobfuscated JavaScript likely serves as a stager to download and execute a second-stage payload, although the specific URL or payload could not be reconstructed from the provided evidence.

Heuristics 9

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
Page-word XOR JavaScript eval stager high PDF_PAGE_WORD_XOR_EVAL_STAGER

PDF JavaScript enumerates rendered page words with getPageNthWord/getPageNumWords, extracts encoded byte fragments, XOR-decodes the stage with char-code helpers, and evals the result. This is an old exploit-kit staging pattern and is not normal document JavaScript.
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_obj0016_000.js` `47b095dc108bf9cc4dec61bef6a0e36c745ceb416c6215247c87a7f66614af87`	pdf-javascript-stream	PDF /JS object 16 at offset 0x16AA	4560 bytes
`page_word_xor_stage_000.js` `4c835c26650b37dd640463f10436b63290299c7888b43e445d1345c273b5a2c7`	deobfuscated-js	page-word XOR decoded JavaScript (decompressed, key=0xBC) at offset 0x7C0	3044 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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