PDF malware analysis — malicious · 865c4d4216612a69

MALICIOUS

PDF

22.8 KB

MD5: e5bfaea94c1675dba3c3d5e2bca8c524 SHA-1: 68a9b1020e9e678175ddcced40fdf75ac71f89f7 SHA-256: 865c4d4216612a6969f001d759f42e5152d5c47ff8bfffc44afc911246454eec

310 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The sample is a malicious PDF that leverages a known exploit (CVE-2009-0927) via embedded JavaScript to execute arbitrary code. The JavaScript is heavily obfuscated but ultimately contains a URL used to download a secondary payload. This indicates a downloader or dropper functionality.

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` `5286c45ef4b7ff3b0d9e125b2cb19cf3c23a215b3b29ae0f308d2ca2d1411624`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3769 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_obj111712_001.js` `2c378a9b5bf19c062d24ab60ceb07a36b7f2a24ed97dfba0e6e6845e0dc83781`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x107D	17383 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_obj111713_002.js` `284fb158d9591f01066377a1806612720b98621da8304781a5e7020583e32eeb`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x549A	1566 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` `85c122e84e3f1cba7183fee594da56b7967dd16f08d67198bea490f93708201b`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x1B2	22873 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 14 long base64-like blob(s).
`javascript_obj111712_004.js` `f0baa765aa7ecd666f9f93cb7ab095cae3f08d33cb098f1568731577ad728638`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x10A1	19050 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` `402636b66b8b4905a0ff7b615011a2e2502be3c96c1a245ceeae06b0b720c51b`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x54BC	1615 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` `42c6e0dfc1b4e08e336adc8028ccac82b04e3e6e9e4d4a4ebc532ab6cd132eec`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x107D	1520 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` `95d52c265d60ffad372da99bb3db5c3f0b48fc84b1aaa90902895f12786cdc82`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x549A	99 bytes
`legacy_pdfkit_stage_002.js` `82baf83c245d2823a5fa2fdd812a45c171a1eb272143e00b062f225348025f4c`	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_003.js` `e89e6e713e68a6d0855f3bf136b96b0a50bd53b402eb4bca04a07fce741cd225`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0x107D	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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