PDF malware analysis — malicious · 0c1279b232c6fe48

MALICIOUS

PDF

22.7 KB

MD5: a3642132d9492669194dcccaa7baf1f2 SHA-1: 95d2c941654450e1f43b2b672c0608357d362552 SHA-256: 0c1279b232c6fe48409ed6dedda57795d9bbd6c94b68c20265e7014074066c69

310 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF exploits CVE-2009-0927 using obfuscated JavaScript to download a second-stage payload from the URL http://gospeltube.com/cache/.svn/.p2/.l.php?l=1&spl=pdf_collab_geticon. The embedded JavaScript uses eval() and unescape() functions, and the extracted artifact was detected as shellcode by ClamAV, indicating a clear intent to execute malicious code.

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` `9ec2746d6288c4f95bdd86462919363f9b4095115ecab1e12b19a874defadbf4`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3736 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` `1818b63d93c206f16588dfc3e1bd332c516253e466efef05c340b8ddd79c09ea`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x105C	17350 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` `2d0676bfe9c484699208c257273c4ec0a9f19cadf766d8770b252508ff3a0afe`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x5458	1594 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` `0b698d6d212b13a4999d2157bf5eb3fbc947095bb644d3d975e7f6978e72dfb7`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x1B2	22835 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` `0edc88e08f69aebd9b877334a8718aa60b182eaec56bdb5367597ce6aa172b55`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x1080	19045 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` `d9269d14538ce662d53e7775f8fb1c60ba1db5dbb4e918500f6509c6d1c19442`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x547A	1643 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` `f5b000f886d808f2c57206a58978d6f1d4e97b6dc6e242e01c3be0e0dcd9a131`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x105C	1528 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` `50891131511fab69138550faf79a66feb86879f6f302c1966c203a453357fec9`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x5458	108 bytes
`legacy_pdfkit_stage_002.js` `85aad505ce8fd8a35f3f49d6fc309fbee754510a9eae67694cb69b24b16fda0f`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x1B2	1637 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` `8895f576bc55a0d16cef025e2d5e6ad316c0d3c804af1c624c35fe34edc94d01`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0x105C	8298 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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