PDF malware analysis — malicious · 3f29c43d30b59331

MALICIOUS

PDF

4.1 KB Created: 2009-09-04 19:49:71 Authoring application: Eblasha 1.4.5.3 (via PDF Library 10.7.10.9)

MD5: 27b25cab5e1e58a49910dda5d5f351cf SHA-1: a95ae96201f06a6e049d7d0077b89555baa5fde6 SHA-256: 3f29c43d30b593318032cff1591fe91784116b97e85970e424cae18d38d45919

208 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious File T1059 Command and Scripting Interpreter T1059.007 JavaScript

The PDF file contains embedded JavaScript that is obfuscated using numeric character codes. Critical heuristics indicate exploitation of CVE-2009-0927 (Collab.getIcon), CVE-2007-5659 (Collab.collectEmailInfo), and CVE-2008-2992 (util.printf). The deobfuscated JavaScript stream, named 'numeric_charcode_stage_000.js', is likely responsible for downloading and executing a second-stage payload. The specific intent of the script cannot be fully determined due to obfuscation, but the exploitation of these vulnerabilities strongly suggests malicious activity.

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` `09c08560c4b674c1882c6862f683d1082fd3bb8084f3946f92e7ffe19757c32e`	pdf-javascript-stream	PDF /JS object 13 at offset 0x37C	17074 bytes
`numeric_charcode_stage_000.js` `1bb2f1b9e4a6cca105ac935796c3624c7b01edf8f8c1925b7a6c44d80853f248`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x3C9	5136 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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