PDF malware analysis — malicious · af7e75dfc6796709

MALICIOUS

PDF

20.9 KB

MD5: aa9c78d0181383db78f374cf9d5cb6ba SHA-1: ed35af0afa76c7418a04e96260764d0b31247043 SHA-256: af7e75dfc6796709a5ede7b5beea92cc18f622f98b360fca3231a9f2582d1df1

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1071.001 Web Protocols

The PDF sample contains embedded JavaScript that utilizes eval() and unescape() functions, indicating obfuscation. The critical heuristic firing for CVE-2007-5659 confirms the exploitation of a known Adobe Reader vulnerability. The embedded JavaScript is designed to download and execute a secondary payload, as suggested by the heuristic and the nature of the exploit.

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` `a1f71625fae5be40a88978f2ef8207f8e4322f89307b7ff84e40cba00081ae0f`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3440 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).
`javascript_obj111712_001.js` `e0fef81e94dcf37fa005f3eae673d92b9077ae0d33f40151b0012191ba630d0f`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xF34	15964 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` `0ee36621bcc3309b3f318fe17efa4c24b358a12e48cdf414846006661ffb49b4`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x4DC6	1431 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).
`legacy_pdfkit_stage_000.js` `953689fb960249e60d549ae413ba994ff514a92f0d9418ac4c9c1cbd5664ba69`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xF34	1476 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` `45f33a2b6011dbedaffbca7d7ed47c6f494a02676d7ebb603cee90d70a37c9b2`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x4DC6	79 bytes
`legacy_pdfkit_stage_002.js` `f8054e03fced65b398bbdfb2df1bfeaa7fc3481669a1462bee8e338d4382087d`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xF34	1556 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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