PDF malware analysis — malicious · 4f308ff6cabf6cab

MALICIOUS

PDF

48.4 KB Created: 2008-08-02 11:25:13 +04:00 Authoring application: PScript5.dll Version 5.2 (via Acrobat Distiller 6.0 (Windows))

MD5: da31bacc316e25a8165982e9145ddb4b SHA-1: 9a76af2cffa3821046f45034712d8e70c1094848 SHA-256: 4f308ff6cabf6cabef4c5de5815c1e67b501dd26487e47f6a9c197210f1c28a4

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that leverages the Collab.collectEmailInfo method, which is known to be vulnerable to CVE-2007-5659. This vulnerability allows for the execution of arbitrary code. Multiple JavaScript streams were extracted, indicating a complex obfuscation or multi-stage execution process. The primary attack vector appears to be the exploitation of this specific CVE to achieve code execution.

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.
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.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://ns.adobe.com/iX/1.0/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://purl.org/dc/elements/1.1/

Extracted artifacts 8

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0016_000.js` `a57b424ce100da4aa84ee81f8350f9368c263ade7ac2d448f11e0ca1c028ff4a`	pdf-javascript-stream	PDF /JS object 16 at offset 0x43D	5110 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 16 eval/decoder/string-building token(s).
`stream_003_off0000230d.js` `b5ba09264c453e6ea26221c74b8d20dbda7e6d374cf193467b0164fbf0f558e4`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x230D	5098 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 16 eval/decoder/string-building token(s).
`stream_004_off00003724.js` `9704210768f89f8242ee4150f13ba121070ca19c15d8e73d89a6d38a86889780`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x3724	5086 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 16 eval/decoder/string-building token(s).
`stream_005_off00004b28.js` `b333b46e743a51e644d0dfd96a6da8a3e090dbda0612768c20ace6d1cfee112d`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x4B28	5117 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 16 eval/decoder/string-building token(s).
`stream_006_off00005f33.js` `7df90752caf373890fe857bc1ba5ce5a6c013e2efed481069a49304384ee988d`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x5F33	5044 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 16 eval/decoder/string-building token(s).
`stream_008_off00008738.js` `fe2a4dcf5f4c049870450e6af801a19f7759b91a2d9e60facf6ac250d9884763`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x8738	5123 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 16 eval/decoder/string-building token(s).
`stream_009_off00009b45.js` `fcdbad2dcd3d550f42012908dc65d730d58f1526949a610390dbbf4c2b88e557`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x9B45	5147 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 16 eval/decoder/string-building token(s).
`stream_010_off0000af53.js` `d6867367a690e713bb2809ec7836f51f1c67a17746e6061516e2791e0677c758`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0xAF53	5147 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 16 eval/decoder/string-building token(s).

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