PDF malware analysis — malicious · 1071ed02ba74b4d6

MALICIOUS

PDF

18.6 KB

MD5: f061eda22df957fb781ddcb7af48979e SHA-1: 3c0eda527de277f1a89781f0635cdfd498204267 SHA-256: 1071ed02ba74b4d691bc043837c16831c99bb9afcc79de48c3c6a9139c46d1bf

310 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file contains obfuscated JavaScript that exploits CVE-2009-0927 using the Collab.getIcon method. The script is designed to download a second-stage payload from the URL http://gospeltube.com/cache/.svn/.p2/.l.php?l=1&spl=pdf_collab_geticon. The use of eval() and unescape() functions, along with complex string concatenation and encoding, indicates a deliberate attempt to hide malicious activity.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 9

Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927

PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (identified after JavaScript deobfuscation)
PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
PDF JavaScript shellcode contains an embedded download URL high PDF_JS_SHELLCODE_DOWNLOAD_URL

Decoded PDF JavaScript shellcode contains a hardcoded http(s) URL stored as little-endian %uXXXX Unicode escapes. Reader exploit shellcode embeds the second-stage fetch URL this way and pulls it down with a urlmon/URLDownloadToFile-style download-and-execute (commodity downloader behaviour rather than a specific Acrobat CVE).
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://gospeltube.com/cache/.svn/.p2/.l.php?l=1&spl=pdf_collab_geticon

Extracted artifacts 11

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111711_000.js` `43b3c3c3c4c8e685b781d9ecf58f89a80e065a5dd6d10581f6755c8110c498b3`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3303 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 6 long base64-like blob(s).
`javascript_obj111712_001.js` `c9f06cd439a2908200c2e2f0847b3cbf797d6b4ce9018bcfbc969887fa803770`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xEAB	13310 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 6 long base64-like blob(s).
`javascript_obj111713_002.js` `d7286c6712573c2a0ed6b676091fdd8b5e3cf002ea2538ac5f4ad31f48fce0f4`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x42DF	1877 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).
`javascript_obj111711_003.js` `99135fa75531a68e70e91a1e08563857aaff2f2f3dd4a4c5d6fa798df99fd2b0`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x1B2	18645 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 17 long base64-like blob(s).
`javascript_obj111712_004.js` `1c7e6dde2814d203d2a641f1511c0ac63d6a9997f4e3abcfc862b63b536255a9`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xECF	15288 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 11 long base64-like blob(s).
`javascript_obj111713_005.js` `ff7b1fa7bcd249a686d62caf735a5f102fe001e4da44d0c2ead9fadd74860e4c`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x4301	1926 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).
`legacy_pdfkit_stage_000.js` `52c91a9608e3f714d85a6db3971883b2b1e89695b04c5fdaca99f69f4ba96464`	deobfuscated-js	double percent-decoded annotation JavaScript at offset 0xEAB	12806 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 38 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `a7bf9e8f3472d8e456111af54d3cbfd9bd06c7e59489254ed4481e1c4d057ace`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xEAB	1520 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_002.js` `95d52c265d60ffad372da99bb3db5c3f0b48fc84b1aaa90902895f12786cdc82`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x42DF	99 bytes
`legacy_pdfkit_stage_003.js` `7983f75ca58807096a192c0596a945b237533ae2d204b86f0eeae10c6011045b`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x1B2	1620 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_004.js` `995dead8a47d708bfa77fbfe5e8c447a556c866cefaa0ae8351710ee72fc900c`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xEAB	8204 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 15 eval/decoder/string-building token(s).

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