PDF malware analysis — malicious · ddd42c698a081711

MALICIOUS

PDF

3.5 KB Created: 2008-07-26 19:43:58 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 7d1d798cf417ff7981f215a685eb44ca SHA-1: c1303e76c7b711977964fd56bc7c4b88c1dbc0f7 SHA-256: ddd42c698a08171116e2469468d46ec42772fc778a366a98d585ca157c600ee1

176 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that exploits CVE-2007-5659, a known vulnerability in Adobe Reader. The JavaScript is heavily obfuscated and uses `eval()` and `String.fromCharCode()` to decode and execute a malicious payload. The heuristic firings strongly indicate that this is a downloader for a second-stage exploit. No specific family could be identified due to the generic nature of the exploit.

Heuristics 6

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)
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
Suspicious extracted artifact high 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.
String.fromCharCode medium PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically (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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_000.js` `fb471618996293e6a76f405533bca2939abdb09973643eb75d2984f235dc069a`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3CE	3454 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`acroform_b64_00.js` `4ba4ab88c3f1342cf560f07bffb8e4de0927ef5d786df57df1104b6e3a86bb4f`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x40B	2223 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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