PDF / .PHP malware analysis — malicious · e6926892836ba919

MALICIOUS

PDF / .PHP

78.4 KB

MD5: 3ce2fe81b842058fa869d7141795b3cb SHA-1: 67d69cd797215686c2540c0206a4678f69790374 SHA-256: e6926892836ba91988fbb03ceeaa909f8bd55efb72b6964262e9191886b4da10

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains obfuscated JavaScript, identified as a stager that utilizes binary-XOR decoding. This stager is designed to exploit CVE-2007-5659, specifically targeting the Collab.collectEmailInfo function in Adobe Reader. The recovered JavaScript is then evaluated, likely to download and execute a second-stage payload. The file type is identified as PDF/.PHP, suggesting a potential web-based delivery vector.

Heuristics 7

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)
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
Binary-XOR JavaScript stager high PDF_BINARY_XOR_JS_STAGER

PDF JavaScript stores viewer-version payload branches as long binary digit strings, XORs each bit pair, converts 8-bit chunks with String.fromCharCode, and evals the recovered exploit stage.
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape 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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0004_000.js` `ede7db734b098c040d0c77f28f37466b917a46f9e77826b66a6e4ea3c7a7502e`	pdf-javascript-stream	PDF /JS object 4 at offset 0xC0	79925 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 6 long base64-like blob(s).
`binary_xor_stage_000.js` `92006980a720c45935ee6feee68cbfb8ebdde81bad142a902735ecfdfce6fdd2`	deobfuscated-js	binary-XOR decoded JavaScript at offset 0x6A8E	1315 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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