PDF malware analysis — malicious · 915d9aebad753390

MALICIOUS

PDF

3.7 KB Created: 2008-31-20 53:85:00 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: f08382946f9bca39dace5dec15082e45 SHA-1: 4685588da9738e5346945aa8b37ddc61a422e71b SHA-256: 915d9aebad7533905a337f668f38434a14ec6f6c931a72241f15b828f18e11db

288 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Shell T1566.002 Spearphishing Attachment T1204.002 Malicious File

This PDF file contains embedded JavaScript that is triggered by the 'OpenAction' directive, a common technique for exploiting PDF vulnerabilities. The heuristics indicate the use of 'eval()' and 'String.fromCharCode()', along with specific CVEs (CVE-2007-5659 and CVE-2008-2992), suggesting the execution of obfuscated malicious code. ClamAV also identified this as 'Pdf.Exploit.Agent-35384'. The embedded JavaScript streams, particularly the deobfuscated 'numeric_charcode_stage_000.js', are highly indicative of a malicious exploit designed to compromise the user's system.

Heuristics 9

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: Pdf.Exploit.Agent-35384 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35384
OpenAction trigger high PDF_OPENACTION

PDF has an /OpenAction — code runs automatically when opened
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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_001.js` `cd71910ce4f7e09a58b5abc711404d520b27acccc70c92e6ee0e58da31c05f81`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3D7	15068 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`numeric_charcode_stage_000.js` `1f292ee3583f53d0097f626f9c1f4846f2482ba62280737cadbe366924cc9b61`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x432	4467 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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