PDF malware analysis — malicious · c088362bf2e91dcb

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: 99dfea3ed96ecff87eddd2aee19256d3 SHA-1: 0dbf940c34571fdee174a32499e1a4fe0354720d SHA-256: c088362bf2e91dcb2cab2d171b4c9f112a8c5c53ed903459d5a759cedee52d19

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.001 Malicious Link T1204.002 Malicious File

The PDF file contains embedded JavaScript that utilizes the CVE-2007-5659 vulnerability (Collab.collectEmailInfo) to execute arbitrary code. The JavaScript is obfuscated and involves multiple layers, including a custom Base64 decoder, indicating an attempt to hide the exploit payload. The primary attack vector is the exploitation of a known Adobe Reader vulnerability.

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)
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_000.js` `b7d21213d9a8beef15282361ff5d488c98978cfbf144f4d9fb9b9e3b01eba9aa`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3CE	3438 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` `8ec0164a40a99b96b09c9a33e5c4f9f318628219bcf3474c58c2db1cdd7d887e`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x40B	2211 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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