PDF malware analysis — malicious · fcaf2cbc19bc0598

MALICIOUS

PDF

12.8 KB

MD5: 05c8fa8677073ac2edf77e30bf632704 SHA-1: 899636f060d120ade7691ca41c86bdc41bb3b027 SHA-256: fcaf2cbc19bc059843fa441257d89310b0fff44a79854c7ea5421779b5b00e77

78 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Shell Scripting: JavaScript T1204.002 Malicious File: Malicious JavaScript

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability (Collab.collectEmailInfo). This script is designed to download and execute a secondary payload, indicated by the presence of deobfuscated JavaScript files. The overall attack pattern suggests a drive-by download or exploit delivery mechanism.

Heuristics 4

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)
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `1847af0a099665b6ac45af66402e56ed64237a1b287618ee3d6643267fda6f35`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	343 bytes
`legacy_pdfkit_stage_000.js` `09556202b03bb4510d043973af94fc8334566dbc0d64a358abf226c44c69b467`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	12517 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `b44c302371eba5b42ec2ec4632496cb5196a7eaa68c543b3fd91c449e3256f7e`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	5227 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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