PDF malware analysis — malicious · 16859054179419d3

MALICIOUS

PDF

19.4 KB

MD5: 0eb74f85d2676834fdd98b071a51a46b SHA-1: b9cb1f74d9f8ffac271e137d9157614f27e12a14 SHA-256: 16859054179419d30d0233930d555ae765a340dc832e1bacd4fd0b026aff0897

310 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains obfuscated JavaScript that leverages the Collab.getIcon method to trigger CVE-2009-0927. This JavaScript is designed to download and execute a second-stage payload from the URL http://gospeltube.com/cache/.svn/.p2/.l.php?l=1&spl=pdf_collab_geticon. The presence of exploit-related heuristics and the embedded URL strongly indicate a malicious document intended for exploitation.

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` `49eb5b2f27f8db99af6def5cbb5189c3e617f643dfad175c347d2c2af0e6701c`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3563 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_obj111712_001.js` `57a2019efae7e454d0cbdd8ec826a34e39644d65709e5136017dd678c5fd7f2c`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xFAF	14256 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_obj111713_002.js` `ab60927a70f2ec99a1b5f38aa1c3ab4a981ed6cecebba9ab106fadc9458bffb4`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x4795	1415 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` `fdf2cd0675d8d3cbe70cf4f4bd282e376fcb3b5feda6ec3debb26805d04c8e2c`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x1B2	19389 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 13 long base64-like blob(s).
`javascript_obj111712_004.js` `1e164df3ac3c9d18e85bafe83c6d58b043515de6d89d9644a2bd38ebb8607610`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xFD3	15772 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 9 long base64-like blob(s).
`javascript_obj111713_005.js` `99bae25161958afd88320374312df359c291b85c57a50c5fead36c0c92d6b818`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x47B7	1464 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` `4e3763a0291aef82355734de38daf20d1925606c5fb2f425f47c118676065bfc`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xFAF	1525 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 0x4795	100 bytes
`legacy_pdfkit_stage_002.js` `9765c937ba3ea2928be40f7c626926ad76192e73bb7b262a5ecb521a740e8df3`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x1B2	1626 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` `2213aa4fdb5b57948b11bc8cc0389df21e449e660a113864010199b3ff083d60`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xFAF	8235 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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