PDF malware analysis — malicious · 8df20ac9196c0ab7

MALICIOUS

PDF

23.5 KB

MD5: 8e7e8ed99860b678e6d9d4c89fea9a13 SHA-1: 6d9df0da5a056fe4e21fc94495b4393119dfff45 SHA-256: 8df20ac9196c0ab710c3329cdb32b4b65e5bfb04fc64f62f2d88ab986474b16f

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The sample is a PDF file that contains embedded JavaScript, which is obfuscated and uses eval() calls. The critical heuristic firing for CVE-2007-5659 indicates the exploitation of a known vulnerability in Adobe Reader via the Collab.collectEmailInfo function. The deobfuscated JavaScript suggests the execution of further stages, likely involving downloading and executing additional malicious code. The presence of multiple JavaScript objects and deobfuscated JS files points to a multi-stage attack.

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` `daf52575d8c8792ca9223e15dea57ccb5a5471a9230f32b439af53eaff6adcbf`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3682 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` `3e9fc23ae3166229ff3f72c2a5dc22c0ccbfa9bbbbf1eb781ed1845cb1e874e7`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x1026	18375 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` `68a88661e08d9126cce2debc5da7c77129f20a650a1669d901bdc17e71b20aa4`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x5823	1400 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `e1ef57e355b39268ad264cc25028a9a0e38b4699b467c94913104d44e9e6dafc`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x1026	1470 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` `8aa55edd5ef092d9b86c6b67feeafc8caec1a3c8b130908fd0f7cf8d3e08d16c`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x5823	86 bytes
`legacy_pdfkit_stage_002.js` `b660aa8434c895fffe1bf32a95f2097b14a53b5d109aa511c39c80676cce74e8`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0x1026	1557 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.