PDF malware analysis — malicious · 35a2de39d1a50f23

MALICIOUS

PDF

12.5 KB

MD5: a1df49b1d228dc2cfda32060163ab378 SHA-1: 25bbe7390ede7f016e1e2a619e505fbce9d96bfd SHA-256: 35a2de39d1a50f2336a6a9f45fe6f6cf86da30a1133ef926337c5dd621a78571

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript, identified by multiple heuristics as malicious. Specifically, the CVE-2007-5659 heuristic indicates the exploitation of a vulnerability related to the `Collab.collectEmailInfo` method, which is used to execute arbitrary JavaScript. The presence of deobfuscated JavaScript files (`legacy_pdfkit_stage_000.js` and `legacy_pdfkit_stage_001.js`) further confirms the malicious nature of the document, likely serving as a loader for further malicious activity.

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` `18f0c943a875055717e5513c6e77023bed81086bc3c42063eab36deb703c9919`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12163 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `555283fd809cad77cc9a680920ea689015a92dfc0b737e8bb1cf7b03ddca1346`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4995 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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