PDF malware analysis — malicious · 803f98dcfdf4060b

MALICIOUS

PDF

12.2 KB

MD5: f79d4e9ad311f20fcca13aa1a0232db1 SHA-1: f10928f24b381cf8f5bbb0fd7af273e9e4259a5c SHA-256: 803f98dcfdf4060b5fcc3323dbfcd0475596d0023c140f93f0329cd72e1973ca

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, specifically leveraging the CVE-2007-5659 vulnerability via the Collab.collectEmailInfo method. This technique is commonly used to download and execute further malicious content. The presence of deobfuscated JavaScript files and ClamAV detection as 'Pdf.Exploit.Agent-36062' strongly indicates a malicious exploit delivery mechanism.

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` `2b83d0e11026b9ee6f2e74184ab93aa9b0cac8691605bc40cebb6a865431d846`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	11802 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `32a779bea9436fcac43c08bb87b661f2285921e5454a7997729570166a19aefb`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4879 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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