PDF malware analysis — malicious · 9599777979889ea3

MALICIOUS

PDF

21.9 KB

MD5: d66d868b7d7349f26d9b8bce51b15f82 SHA-1: 42b6b0fa67f83a46f8c6c25d652295be509b37ec SHA-256: 9599777979889ea38fe981cafa358fdc6ebd96965ccc066171b5e52f37ebbd08

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

The PDF file contains embedded JavaScript that utilizes eval() and unescape() functions, indicating obfuscated code execution. The critical CVE-2007-5659 heuristic firing confirms the use of a known exploit targeting Adobe Reader's Collab.collectEmailInfo function. This JavaScript is designed to download and execute a secondary payload, which is a common technique for initial access and further system compromise.

Heuristics 5

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
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` `1bb0910922379c5828636397f1f29c1dc97074268d88f7cdb37c023a6e4b3ea5`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3336 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_obj111712_001.js` `9a02f511c097e8223ec4e934f6549c7ac6cc98855ede84ab69baef3789ae33d5`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xECC	17017 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_obj111713_002.js` `ed3a2d67d25f063f1cbc73634b90157b462cbe6868764cdca3ba60cc60bd92ec`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x517B	1459 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).
`legacy_pdfkit_stage_000.js` `5b834cb777e4b751deef8a00c9ea05090b3429d2751ac04cee72959262540f14`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xECC	1475 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` `66201566cb7b94b96d78c07e61c80e11578b5125ea85cc864e3cc788698af3dd`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x517B	79 bytes
`legacy_pdfkit_stage_002.js` `2052381c25b47f994a38be4525b6d6636d840f9c31fb716c79096e464b9db1a4`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xECC	1555 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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