PDF malware analysis — malicious · 3a8244933d1f6092

MALICIOUS

PDF

12.2 KB

MD5: e1d82d0e17da32e2b6b9ce7fc459468b SHA-1: ead80dfd4fdf4e09b234b3d78c5b06f883605489 SHA-256: 3a8244933d1f60923f7ce70c2d9046e4e8f6ed1de2d209c210985a694f51d57f

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that exploits CVE-2007-5659 via the Collab.collectEmailInfo function. This JavaScript is further deobfuscated into two stages, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js. The primary function of this script appears to be downloading and executing a second-stage payload, indicated by the critical heuristic firings and the nature of the extracted JavaScript.

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` `c7edb657e45c77a3f2e674e661c74413f71720da4bc9c7d20b8afe1b0382c139`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	11834 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `5cc194cf2686fe8dbd479f5e189ac4dcaa08454a58eda261abd42dba09737d90`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4893 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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