PDF malware analysis — malicious · 08d9d98b437565b3

MALICIOUS

PDF

2.7 KB Created: 2095-01-01 Authoring application: 1844

MD5: e68eea5023319722df3d9f0db4827c58 SHA-1: 6ac95b1e47bc8a295dd6efe22901735b3b66d8ce SHA-256: 08d9d98b437565b3cd29a4e6197213f6fe16480aa0c11b1665d457f5e0e67033

648 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains embedded JavaScript that leverages multiple known vulnerabilities in Adobe Reader, including CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. The JavaScript is designed to download a second-stage payload from the URL http://webzarabotok.ax3.net/load.php?stat=Windows. This indicates a multi-stage attack aimed at executing arbitrary code on the victim's machine.

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://webzarabotok.ax3.net/load.php?stat=Windows

Extracted artifacts 12

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `b8865801dbc9173b87d79bcc77e1c40bfe22f2cc2d3fbf3071c2c7caccafec8c`	pdf-javascript-stream	PDF /JS object 13 at offset 0x328	4799 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` `92b44b751aedf31906cb51e2f7b70940ad396b53fdf9eb5c16382fb82f9d3d14`	deobfuscated-js	generic stage recovery split-literal-normalize from JavaScript object 13 at offset 0x328	4779 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` `b81e7dabcb41a41d4437d0995103abb2a1c409f92b0ac60e04cbb7ec5fa908f2`	deobfuscated-js	generic stage recovery percent-decode from JavaScript object 13 at offset 0x328	3931 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` `ad92a663744c3bff3192637cef61711f52f2035ffd52c14fe09f019f58b32008`	deobfuscated-js	generic stage recovery split-literal-normalize from combined JavaScript objects at offset 0x9	4790 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` `1f2c6d0946bfafb16265c7d1e5bda41b0e9bc5e573f84831cdf0839e8f1f3dff`	deobfuscated-js	generic stage recovery percent-decode from combined JavaScript objects at offset 0x9	3942 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` `e7b7af0a1fe73f8861df89a52b565deaa55c4375e4f5f0072b6c5b1887312ff1`	deobfuscated-js	generic stage recovery percent-decode from decompressed stream at 0x328 at offset 0x328	3697 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` `51fd20acf2e56888d9f60a9e3d216532d253793ec66459f48f34deb086cdb6a7`	deobfuscated-js	generic stage recovery split-literal-normalize -> percent-decode from JavaScript object 13 at offset 0x328	3911 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` `edaab59ce6082ed89a870496c47e899ad086192bd795f4eb69e688a79d4777d9`	deobfuscated-js	generic stage recovery percent-decode -> percent-decode from JavaScript object 13 at offset 0x328	3927 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` `a29447c9d5d9da0c26eebca662b12863f0491ac911a327de3b0fc72b65638248`	deobfuscated-js	generic stage recovery split-literal-normalize -> percent-decode from combined JavaScript objects at offset 0x9	3922 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` `830b0f171a249edd841cc8dffaad502e349279c329ef969733c36b58db2186ee`	deobfuscated-js	generic stage recovery percent-decode -> percent-decode from combined JavaScript objects at offset 0x9	3938 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` `dedd720e5aa2aa8312d7285133b741ccf67e11ce4853194be8c94804339e2eda`	deobfuscated-js	generic stage recovery split-literal-normalize -> percent-decode -> percent-decode from JavaScript object 13 at offset 0x328	3907 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` `eee893c7cff7521440480501278ba15eafbfbf853bbe1e8aede68fcb6e99b35f`	deobfuscated-js	generic stage recovery split-literal-normalize -> percent-decode -> percent-decode from combined JavaScript objects at offset 0x9	3918 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 12 eval/decoder/string-building token(s).

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