PDF malware analysis — malicious · 70d0fbdf0a9f25ac

MALICIOUS

PDF

8.5 KB Created: 2009-07-06 13:07:00

MD5: cd304fa00ac2dc03f13fcfd514cbbfeb SHA-1: 36d4b1dd7931dd79f0e32bf12c16f92d9c7d3eb2 SHA-256: 70d0fbdf0a9f25ac9059eedf9617cea3372e8af4fc2b04cd143f4efb38070f08

408 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains obfuscated JavaScript that exploits known vulnerabilities (CVE-2009-0927 and CVE-2007-5659) in Adobe Reader. The script is designed to download and execute a second-stage payload, indicating a typical exploit-kit delivery mechanism. The presence of multiple JavaScript exploit stages and high confidence ML/ClamAV detections support this assessment.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 10

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)
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. (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: Pdf.Exploit.Agent-35649 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35649
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.
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.

Extracted artifacts 5

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `6f8e7eecb360e7e406f75082e1dec2f5858bd3052eeacab700ba90c23db21d07`	pdf-javascript-stream	PDF /JS object 7 at offset 0x59E	6515 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 11 eval/decoder/string-building token(s).
`generic_stage_recovery_000.js` `ffe7c1c8fc128d1a579245854fed29564ea3f47d1c90fa61234c1219830bdff1`	deobfuscated-js	generic stage recovery split-literal-normalize from JavaScript object 7 at offset 0x59E	6092 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 11 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`generic_stage_recovery_001.js` `f5e397add6fd188e46ec5c776cb6532ba7935e69ba89d7fff2b64c51dd5cdb83`	deobfuscated-js	generic stage recovery split-literal-normalize from decompressed stream at 0x131A at offset 0x131A	2691 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 11 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`generic_stage_recovery_002.js` `4a6280d4b7998fdcd2921e8ac1fedc73e0a622f0863712151d240c6c3a62e401`	deobfuscated-js	generic stage recovery split-literal-normalize -> percent-decode from JavaScript object 7 at offset 0x59E	6088 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 11 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_000.js` `e02e2a3bae5c73bf215cd72464cd0cd24899c02b4725be7065c7303db8f7b64c`	deobfuscated-js	string-concatenation normalized Acrobat API aliases at offset 0x59E	276 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).

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