PDF malware analysis — malicious · 43c06e2105128ad4

MALICIOUS

PDF

12.9 KB

MD5: fb57b67ddd466bbfffbfbfa45dfaaca5 SHA-1: 92f0d2f6a6da475505391ad7a1c1eacb853f5a5f SHA-256: 43c06e2105128ad40a2361635c565d177cbaca255c10db08f709cd501c4ef4dc

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The file is a PDF containing embedded JavaScript, identified as malicious by ClamAV (Pdf.Exploit.Agent-36062). The critical heuristic CVE_2007_5659 indicates the exploitation of a known vulnerability using JavaScript that is constructed by concatenating document info fields and extracting characters at a fixed stride. Two deobfuscated JavaScript files were extracted, suggesting a multi-stage loading process. The embedded JavaScript likely downloads and executes a second-stage payload.

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` `b78dc4ab95064d51e4376891bc171aa11ada00c11b28767bf886f4a960e3f06a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12696 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `8a150eb47c5606fb2a4819583e2fab2fa57f55c6a3098d1f393b9ad91d6231a2`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5241 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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