PDF malware analysis — malicious · 0d541ef1b71b6d9d

MALICIOUS

PDF

21.0 KB

MD5: 3efbdda285dc8c37b2771ea41a7f02f7 SHA-1: 85c3c2c19febd770d88e95c63b8a07c9baa429d8 SHA-256: 0d541ef1b71b6d9dfd1b46d72dc367ad9aed303a67dc24ba6b7bf7e880366805

310 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF sample contains embedded JavaScript that leverages the CVE-2009-0927 vulnerability, specifically targeting the Collab.getIcon function. This JavaScript is designed to download and execute a shellcode 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 obfuscated string concatenation, indicates an attempt to conceal the malicious payload.

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 10

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111711_000.js` `90cb8c2a742b18e0901333194a5cac1b56739e54dda04c8d500c7226bd3e2e08`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3495 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` `fc920e9a4c4a6d29d7cd50d56ad04c42947ba4cef5c747ac7a3bb3c56b08fcfb`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xF6B	15892 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` `b24279befc19ff12b907d4b502a0d9d37e5f818e1f5a23b7b1d1c39263168ddd`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x4DB5	1506 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 4 long base64-like blob(s).
`javascript_obj111711_003.js` `eb03cc88ffa386c716ece09e5f6d0a69b226b8532b6d32b929489b0c779350da`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x1B2	21048 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 16 long base64-like blob(s).
`javascript_obj111712_004.js` `07340926e89ba36bdc43d52125686037ca82ab7cf560e99750d57b1e225e6d98`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xF8F	17499 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 10 long base64-like blob(s).
`javascript_obj111713_005.js` `91721f085cf2ece42bef0b85779841ff533755b995aeee456bd4c003bc467655`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x4DD7	1555 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 4 long base64-like blob(s).
`legacy_pdfkit_stage_000.js` `2e5757628cc1ad757791e90b0d2b4bab2d0a6d0399b092c113c0f19217d727ae`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xF6B	1526 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `407624ceb11bdfcccd03817d5cc6229f3a3f8dfc15051e1567d07f2b81bcede8`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x4DB5	100 bytes
`legacy_pdfkit_stage_002.js` `9117f38c615566c39a9cc28f4e4a4e9aea70febe739f9ddf2efb1269a5e8a6f5`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x1B2	1627 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_003.js` `fa3864a80c600ea10817811baf010bc73478c083b641c37b21c61cf4d02cb38a`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xF6B	8240 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 15 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.