PDF malware analysis — malicious · a1ef99259841c760

MALICIOUS

PDF

4.0 KB Created: 2009-09-14 19:42:14 Authoring application: Eblasha 7.8.2.10 (via PDF Library 1.7.6.5)

MD5: 284c8875cb51f8974bfbaf81f78863f4 SHA-1: cea8a9b3a70d98d9af5e0a66ab18c709019cb8b9 SHA-256: a1ef99259841c760926f093f90e15c5a4a38162a9374e515f74f19655395835f

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious Link

The PDF file contains multiple critical heuristic firings indicating exploitation of CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992 through embedded JavaScript. The JavaScript stream, identified as 'numeric_charcode_stage_000.js', is likely responsible for downloading and executing a secondary payload. The document body is obfuscated and does not provide direct clues to the user-facing lure.

Heuristics 7

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)
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.
ASCII85Decode filter (with exploit indicators) low PDF_FILTER_85

ASCII85 encoding filter present alongside exploit delivery indicators — uncommon outside of obfuscation
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_obj0013_000.js` `721808babd1f7d3c68830e04510be353922fffa658992702adc77e870e257945`	pdf-javascript-stream	PDF /JS object 13 at offset 0x37C	16504 bytes
`numeric_charcode_stage_000.js` `16b33342b57ed296beb6219404b7ebbfbcf92017b792168998cc05d104ad3a56`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x3C9	4956 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 9 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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