PDF malware analysis — malicious · bfb8ff8b8a6ea950

MALICIOUS

PDF

12.7 KB

MD5: 08e359597836eb7a6a5fefa7057539ea SHA-1: b9c63b5e7fbf773b7981c10d9b1633e9df139b4f SHA-256: bfb8ff8b8a6ea950d3ced0fed743c47e182f42a09cb7957d19dd7b65f3f773e9

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, which is flagged by multiple heuristics as malicious. Specifically, the CVE-2007-5659 heuristic indicates the exploitation of a vulnerability related to the `Collab.collectEmailInfo` function, commonly used to launch embedded scripts. The presence of deobfuscated JavaScript files further supports the execution of malicious code, likely for downloading and executing a secondary 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)
ClamAV: Pdf.Exploit.Agent-36062 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36062
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` `068944f8c011a88ab770b45c6de142b9305a1f515d410204d5eadd9ac2b5bfb3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	373 bytes
`legacy_pdfkit_stage_000.js` `be2bcd8d2e3d62ff90a14579959e06d48c9f5abf981ff336da9152b176f03d97`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12465 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `f2ed93ab63ebda45292ccbc81d170c9bb6cdbab3eefdb5fd17b3d1746224b365`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5105 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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