PDF malware analysis — malicious · d41bf53d81b760d0

MALICIOUS

PDF

11.9 KB

MD5: e58183112e90d275cd824d793208e987 SHA-1: e6fdc4468400e794582231c4ec4cdb3bd816e5c4 SHA-256: d41bf53d81b760d0af8612b5191fd3de8529f8bb80f98fcd01c7e79b1b2d26e3

320 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1059.007 JavaScript

The PDF file contains embedded and obfuscated JavaScript that exploits multiple known Adobe Reader vulnerabilities. The heuristics indicate that the JavaScript is decoded by splitting a numeric array and mapping it through a character table, a common technique for delivering exploits. This is further confirmed by ClamAV detection as Js.Exploit.HTML-28. The primary attack vector is the exploitation of these CVEs to achieve arbitrary code execution.

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` `55e497568c2482f0975a50e473209c681da0d6fb9726cfa35971f7ff959c9bfb`	pdf-javascript-stream	PDF /JS object 76 at offset 0x2C2	11243 bytes
`split_char_table_stage_000.js` `67b01931ec44193af6ef0eed4e5c7ace8613d0dc98c31a1e8911cd161cf2df80`	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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