PDF malware analysis — malicious · f0ae963c8fcb67d0

MALICIOUS

PDF

25.2 KB

MD5: 35cb420c985ce31bf9d411465307ba15 SHA-1: 475eee25c357d959e535aaa39b6124f429d74625 SHA-256: f0ae963c8fcb67d024bcc28c58b0db50abd73ec6fb12cc2fd2e8cb897a6e276e

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF sample utilizes the CVE-2009-0927 vulnerability, specifically targeting the Collab.getIcon JavaScript API. The embedded JavaScript streams are heavily obfuscated, but static analysis indicates the use of eval() and unescape() functions to deobfuscate and execute further stages. This pattern is consistent with exploit kits attempting to download and execute arbitrary code. The primary attack vector is the exploitation of a known PDF reader vulnerability.

Heuristics 5

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)
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111711_000.js` `262e4bb0e88277f72f94530d301ff5b9d5e34ebe2530259e99abb38c55e67732`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3631 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` `0cc3172c8fe926715a67972cdae70dcd9537f7fba2a29639bb7e3a5b53154fc2`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xFF3	19598 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` `eee862aa088875cd5fd0013efba4d0add9726c1f445104f83f2717049bb5aa09`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x5CB7	1961 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).
`legacy_pdfkit_stage_000.js` `3dc47bebccef2924dbd28ea493f9cdd345a2d91c74a0070d38fb33dc7296fd48`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xFF3	1530 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` `b21477a4aa38f91ea07f6cc058eb252a49cacf44426decb5b077a6b156075966`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x5CB7	107 bytes
`legacy_pdfkit_stage_002.js` `57548fe75b54ca14e9db248040422c3ad07312af146b72d7d5bb1b23482af5e9`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xFF3	1638 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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