PDF malware analysis — malicious · 44ef9d32c176b576

MALICIOUS

PDF

12.1 KB

MD5: b2cf1f393bf249a3126d6e7c3adbc308 SHA-1: 8a509455bad7d690b274ee6e93f3b8a719fbeaa9 SHA-256: 44ef9d32c176b576483530e42e2e125332d6697ed7e15180e25136cf1f7bc19a

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2007_5659 heuristic indicates the exploitation of a known vulnerability (Collab.collectEmailInfo) to execute this JavaScript. The extracted artifacts 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js' suggest a multi-stage JavaScript execution, typical for downloading and running further malicious content. ClamAV also detected this as 'Pdf.Exploit.Agent-36062', reinforcing its malicious nature.

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` `f79e3e3e641dda810101ec67e304f54b456cae3ac660e03db02c71b87be465ad`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	11755 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `581fd288cf22105934cfdc14c1b1e53211e4e813a7f4026d537cfd63c6271e4b`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4863 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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