PDF malware analysis — malicious · 0f54d2d92f81c65d

MALICIOUS

PDF

2.7 KB Created: 8930-01-01 Authoring application: 9389

MD5: d6c6110a6f3449e0bec0820674a23892 SHA-1: eb82f7959a93cd86501ffe09eac498f48a5a65be SHA-256: 0f54d2d92f81c65d5391f795be0935fe797df78ecd441545e7b5546f7b28b500

648 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains obfuscated JavaScript that exploits multiple CVEs in Adobe Reader, including CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. The script is designed to download and execute a second-stage payload from the provided URLs. The presence of multiple exploit indicators and a high ML classifier score contribute to the confidence in this assessment.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 15

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. (matched in decompressed stream)
Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (matched in decompressed stream)
util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992

PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (matched in decompressed stream)
Pidief-style multi-CVE JavaScript dispatcher critical CVE likely PDF_PIDIEF_MULTI_CVE_DISPATCH

A single JavaScript body branches on app.viewerVersion and invokes two or more of the canonical Reader sinks (Collab.collectEmailInfo, Collab.getIcon, util.printf with a field-width format string). This is the 2009-2010 Pidief.J multi-exploit landing template: a per-version dispatcher that fires the matching CVE chain for whichever Reader version opens the file.
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.
Multi-CVE Adobe Reader JavaScript exploit kit critical PDF_ADOBE_READER_MULTI_CVE_JS_KIT

One recovered JavaScript stage contains multiple version-gated Adobe Reader exploit branches. This is stronger evidence than independent API keywords: the PDF is selecting old Reader vulnerabilities by viewer version and running heap-sprayed Acrobat JavaScript exploit paths.
ClamAV: Pdf.Exploit.Agent-36014 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36014
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
Generic recovered JavaScript exploit stage high PDF_GENERIC_STAGE_RECOVERY

Bounded static stage recovery exposed hidden JavaScript through generic transforms such as null-byte collapse, percent decoding, marker replacement, arithmetic character codes, fromCharCode, numeric arrays, numeric-array minus-key decoders, alphabet-index arrays, /Producer half-difference metadata arrays, hex literals, marker-stripped Base64 literals, custom 6-bit XOR table decoders, or repeated-marker hex carriers. This rule is emitted only when the recovered stage contains exploit-like Acrobat JavaScript or shellcode markers.
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).
Suspicious extracted artifact medium 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.
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.
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://rublikos.ax3.net/load.php?stat=Windows/load.php&s=1
- http://rublikos.ax3.net/load.php?stat=Windows/load.php&s=2
- http://rublikos.ax3.net/load.php?stat=Windows/load.php&s=3

Extracted artifacts 12

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `9c4cedf664a1459832f34e5967c11f7daba8d795dc0de70c2c888955730959f6`	pdf-javascript-stream	PDF /JS object 13 at offset 0x328	4757 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 10 eval/decoder/string-building token(s). Carved artifact contains 3 long hex-escaped blob(s).
`generic_stage_recovery_000.js` `33f41331701ec7dcbb366c8bf99fda3e9b1d632face4cb58456b098b476881ea`	deobfuscated-js	generic stage recovery split-literal-normalize from JavaScript object 13 at offset 0x328	4737 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 10 eval/decoder/string-building token(s). Carved artifact contains 3 long hex-escaped blob(s).
`generic_stage_recovery_001.js` `9cedf5866a47d8184952ab342c5de1a9845e96c613aafcf7a4d7f24a475c1de3`	deobfuscated-js	generic stage recovery percent-decode from JavaScript object 13 at offset 0x328	3879 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 12 eval/decoder/string-building token(s).
`generic_stage_recovery_002.js` `758e58a2d4061e1efbe8ead6a9bb1930cbf70698e2164b0072217124cce6b748`	deobfuscated-js	generic stage recovery split-literal-normalize from combined JavaScript objects at offset 0x9	4748 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 10 eval/decoder/string-building token(s). Carved artifact contains 3 long hex-escaped blob(s).
`generic_stage_recovery_003.js` `034dbd9e749512363d98d951ae073484b2ddf856f1c5dc2581617951824710d6`	deobfuscated-js	generic stage recovery percent-decode from combined JavaScript objects at offset 0x9	3890 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 12 eval/decoder/string-building token(s).
`generic_stage_recovery_004.js` `4cebef414a013a511555757e68349e5a12656b18b1c8ccd914da7652f1fc8ef5`	deobfuscated-js	generic stage recovery percent-decode from decompressed stream at 0x328 at offset 0x328	3645 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 12 eval/decoder/string-building token(s).
`generic_stage_recovery_005.js` `39fbef56a2e61f0ec39b3f65cc90de855d366674d4e27da6e12cc44c48814057`	deobfuscated-js	generic stage recovery split-literal-normalize -> percent-decode from JavaScript object 13 at offset 0x328	3859 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 12 eval/decoder/string-building token(s).
`generic_stage_recovery_006.js` `65a52ffb829afa863585367ac583e0088ea28168ef3e0d57e5d97958c6398655`	deobfuscated-js	generic stage recovery percent-decode -> percent-decode from JavaScript object 13 at offset 0x328	3875 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 12 eval/decoder/string-building token(s).
`generic_stage_recovery_007.js` `96a001302be0c82f53fd6bcf74da92c27bac6ef05aacbd178613b3b3572c53e1`	deobfuscated-js	generic stage recovery split-literal-normalize -> percent-decode from combined JavaScript objects at offset 0x9	3870 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 12 eval/decoder/string-building token(s).
`generic_stage_recovery_008.js` `0399b29bf21fe5643f7ba5c7b3e1ff85a735d8fefd40aec26dc2570a90459228`	deobfuscated-js	generic stage recovery percent-decode -> percent-decode from combined JavaScript objects at offset 0x9	3886 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 12 eval/decoder/string-building token(s).
`generic_stage_recovery_009.js` `771eba491530bda6fa7eaea9f956a5f0d72ad4c09ab495aab36ddaaf354144cb`	deobfuscated-js	generic stage recovery split-literal-normalize -> percent-decode -> percent-decode from JavaScript object 13 at offset 0x328	3855 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 12 eval/decoder/string-building token(s).
`generic_stage_recovery_010.js` `a3cf27dfd8fdb356b515bde16e2a3eac4470046e2c01022bba160a1e33cb5754`	deobfuscated-js	generic stage recovery split-literal-normalize -> percent-decode -> percent-decode from combined JavaScript objects at offset 0x9	3866 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 12 eval/decoder/string-building token(s).

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