PDF malware analysis — malicious · 380fda4973afd4cc

MALICIOUS

PDF

12.2 KB

MD5: eed17762acdba17cdf19d0bc135f251f SHA-1: b378ae62f61bb657fce85c205e3ea4f05f615ca3 SHA-256: 380fda4973afd4ccf7f27bf05f3968dd5ec54bb1171f6b441ed52a5e2d6abb19

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that exploits the CVE-2007-5659 vulnerability using the Collab.collectEmailInfo method. This JavaScript is further obfuscated and split into multiple files, indicating an attempt to conceal its malicious actions. The primary function appears to be downloading and executing a second-stage payload, as suggested by the heuristic firings and the presence of deobfuscated JavaScript files.

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` `0a9cdfe43da0bf1da007231ed73778850cc639adf2a26e4ae16fd463be5668c3`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	11846 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `f394c90f4173c37d86af72bb353fd7dc6a3ebf08098015551cc145b73f0aa0ea`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4834 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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