PDF malware analysis — malicious · 012066a96f84b724

MALICIOUS

PDF

17.6 KB

MD5: 1705b94424d309b6b19ab3abb1eeea27 SHA-1: fa35d8f6dd9e9adbd34b21fc761cfe97415ccac1 SHA-256: 012066a96f84b7242f8c9cff051030498b0ec01574386f510112deb70277ed24

310 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF exploits CVE-2009-4324 using obfuscated JavaScript, which is designed to download a second-stage payload from the URL http://gospeltube.com/cache/.svn/.p2/.l.php?l=1&spl=pdf_newplayer. The use of eval() and unescape() functions, along with heavily encoded strings, indicates a deliberate attempt to hide malicious activity. The extracted artifact was also flagged by ClamAV as a JavaScript exploit.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 9

media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324

PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009. (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_newplayer

Extracted artifacts 10

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111711_000.js` `94f094488e7ac1631e187929c778655e44415a12d04512527ae03298cf6eba69`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	2855 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` `4154937950481481f11cd8f569ceb08c727870217dc9d05384187d9a6b56efc6`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xCEB	11973 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` `a794a602e892d12acf2abb4a9d9a1112766c705a880ad961ef4f74c4d811dc06`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x3BE6	2624 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` `3297d10c487ff077c048fa42a289762d502d469a7fe5fe523a2f2a090097da09`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x1B2	17608 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` `a47e83c55f9e440cf98e1a42e1810e559e5729b3f3fb74160099943b88846b93`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xD0F	14699 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` `9fe73a8ecf7ad89a022ed5d2a2527a7f70adfb8cf350fead7872d3ce31501824`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x3C09	2673 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` `14d9d23d619682a659b666d1537fbe47a8cc4db49b0c37d63714847d39b24a42`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xCEB	1080 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `cd7088aa0ba5ce42db7faac79c4063dccc339c8953139714658e9cb6b07c91fc`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x3BE6	165 bytes
`legacy_pdfkit_stage_002.js` `5a28b8a1cf9038e2d391edb32c4472d4fc2910cc98f13fb214bfea8bff177a49`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x1B2	1246 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_003.js` `66839ffc4f951a01cbff51f65060fa8e3d61384a6f605c5192a429e63b1fc407`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xCEB	6400 bytes
Detection ClamAV: Js.Exploit.Shellcode-18 Obfuscation or payload: likely Carved artifact contains 10 eval/decoder/string-building token(s).

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