PDF malware analysis — malicious · 0b13d8554db8095d

MALICIOUS

PDF

19.8 KB

MD5: bf764f59510835423ab784f865a11e2c SHA-1: 879081c301aee68bb4cbbda4147be461ba5c76ee SHA-256: 0b13d8554db8095ddd13e4f2603fc86eabb5ce6cb9fbb965e947fb732b72edb4

310 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF sample contains obfuscated JavaScript that utilizes the 'eval()' function and exploits the CVE-2009-0927 vulnerability (Collab.getIcon). This JavaScript 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 ClamAV detection of 'Js.Exploit.Shellcode-18' further confirms the malicious nature of the extracted script.

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` `9093bef3bcfd23142ad40aafc51a77f12476511d13f28e230a9d603cf87a10d0`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3331 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` `48893af33d3bfb73ee8f88afc695027b312455cf847080ded50292e92dbfe801`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xEC7	14499 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` `479ea2a5ac1355091c821ca0ba815eac8391acba4eecf1677685244f2f9b584c`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x47A0	1903 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_obj111711_003.js` `b8deeb07eb7f7c201013fc65b17684fed9d2930814394f43c15d06a2bd33886d`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x1B2	19888 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` `f8dee7b55d90eaaec4d7c916099904eaf69f6f8cca64dff0aaf46a4da7aa2a70`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xEEB	16503 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` `41b6c186b8d021a141f0b7637f88d1a0407cb22d4a7ab836695d3f6ab46bd417`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x47C2	1952 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).
`legacy_pdfkit_stage_000.js` `42c6e0dfc1b4e08e336adc8028ccac82b04e3e6e9e4d4a4ebc532ab6cd132eec`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xEC7	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` `d71e749c11bf5dc346c7e7c764bffbe6ba3758d8b79b9ded9b2f874b8d25fee5`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x47A0	107 bytes
`legacy_pdfkit_stage_002.js` `1297e2db977b9a0d863734a9d1ab89d22533ad77629eeefe796f53eb9f11cbdf`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x1B2	1628 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` `00310dec16970e350b8793c3f527671bd6d2f6df5558665a15e6b806db2cf004`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xEC7	8252 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.