PDF malware analysis — malicious · fa037ca5e8bcf4fa

MALICIOUS

PDF

12.3 KB

MD5: dbe5422b97fe027fab8aa1409618ee76 SHA-1: 68e0e2cc90f50c944e75ee8763ae527617b95cda SHA-256: fa037ca5e8bcf4fae07834d53e44a96095d44ea2c8e54270555aa3c5e647a253

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The file is a PDF containing embedded JavaScript, which is flagged as malicious by ClamAV (Pdf.Exploit.Agent-36062). Static analysis identified a critical heuristic for CVE-2007-5659, specifically related to the 'collab.collectEmailInfo' JavaScript function. This function is known to be used in PDF exploits to execute arbitrary code. The embedded JavaScript streams, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, likely contribute to the exploit chain, potentially downloading and executing further payloads.

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` `fe5565186a69a0373c1cd822e44dffd1e0226c6b9ef6af9e4325f477d19a4c5f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	11898 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `30bcf5f204e5330be572e355f444c2b63e43639e9d7735912a46bd7af5d1c74b`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4892 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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