PDF malware analysis — malicious · 1f9b5ff0b48cc984

MALICIOUS

PDF

12.4 KB

MD5: db57d9eee1c435f88b5f36cdc5f3b3d2 SHA-1: 1ca125eb7e7318e633738e468739129c35575cdb SHA-256: 1f9b5ff0b48cc9840a610f56b9b076672b7b0aba777f9217679e217341c51265

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF document contains embedded JavaScript, specifically triggering the CVE-2007-5659 vulnerability via the Collab.collectEmailInfo method. This vulnerability is known to be used for executing arbitrary JavaScript. The heuristics indicate that the PDF launcher concatenates info fields, extracts characters at a fixed stride, and evaluates the result, suggesting a custom exploit loader. Two deobfuscated JavaScript files were extracted, indicating a multi-stage approach. The exact payload and ultimate goal are not fully discernible from the provided information, but the exploit mechanism is clear.

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` `cff3b8fa23039f9397cdf192fef48fbe1f8462449c8c074898f3a29159f4d243`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12010 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `12f1b467532a65507c0fbdd1794d87a246586f25fc38b62cf56ed8d3db2c9090`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5014 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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