PDF malware analysis — malicious · dfcfec96ac621057

MALICIOUS

PDF

11.8 KB

MD5: 233a80bd192cb6accb1590cd767cadd5 SHA-1: 3517ddca538bde706caf2f3d25d81aac3ce67c18 SHA-256: dfcfec96ac621057772bb566bca7bda0cb6518d0e13b89019245ba11c165a294

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Script Execution T1204.001 Malicious Link/URL: Malicious File

The PDF file contains embedded JavaScript, identified as a stager for CVE-2007-5659. The critical heuristic 'CVE_2007_5659: Collab.collectEmailInfo' indicates the exploitation of a known vulnerability to execute arbitrary code. The deobfuscated JavaScript, 'annotation_subject_callee_hex_stage_000.js', is responsible for decoding and evaluating the malicious payload, likely leading to the download and execution of a second-stage payload.

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)
Annotation subject callee-key hex JavaScript stager high PDF_ANNOT_SUBJECT_CALLEE_HEX_STAGER

PDF JavaScript uses syncAnnotScan()/getAnnots() to read an indirect annotation /Subject stream, percent-decodes it through marker replacement, then uses a callee.toString()-derived key to decode and eval the final 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.
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_obj0007_000.js` `83c89bafa116d9c91eff0b9ebda502f5bf0baa04c36fa774c6ebc2756ba3479f`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A6	585 bytes
`annotation_subject_callee_hex_stage_000.js` `ce239b4ffcbc8569ba2e1db71304f246d4ea6daa24ac4d7ec275860955144f77`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x14F	5134 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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