PDF malware analysis — malicious · d27f5c589846bdc2

MALICIOUS

PDF

135.3 KB Created: 2008-02-27 16:58:09 +08:00 Authoring application: PScript5.dll Version 5.2 (via Acrobat Distiller 6.0.1 (Windows))

MD5: 06f04866376add17e76c76a92bae32dd SHA-1: 06f3c43888b1b4c570f6552518605453bebc46ae SHA-256: d27f5c589846bdc2616350bb60c5795978e9052eabe3f6cae93d5eec36634788

126 Risk Score

Malware Insights

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability (Collab.collectEmailInfo). The JavaScript stream is obfuscated and uses unescape() calls, indicating an attempt to hide malicious activity. The primary goal appears to be downloading and executing a second-stage payload from a remote source, as suggested by the embedded JavaScript and the 'Suspicious extracted artifact' heuristic.

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. (matched in decompressed stream)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0017_000.js` `63ff694d5eab04f4c6c497114078312c89e660bd3dd6850c6c3625ae28b1b91f`	pdf-javascript-stream	PDF /JS object 17 at offset 0x6A2	4627 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 16 eval/decoder/string-building token(s).

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