PDF malware analysis — malicious · 2588fde292a620d0

MALICIOUS

PDF

12.4 KB

MD5: c5e0a33b53fbaf9b2c8065920c1a1cd2 SHA-1: c1bc9bad096d21bd4d0da3adf0f3f544ab73a3db SHA-256: 2588fde292a620d02a866f4c5dcaf76e9f254ca388f6b77b45ffedf78b0bf54d

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The critical 'CVE_2007_5659' firing specifically points to the use of the 'Collab.collectEmailInfo' JavaScript function, a known method for exploiting vulnerabilities in PDF readers. This function is used to construct and evaluate JavaScript code, likely to download and execute a secondary payload. The presence of deobfuscated JavaScript files further supports this. The file is detected by ClamAV as 'Pdf.Exploit.Agent-36062', confirming 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` `16a2e08dfc01b5c3bd9298fc3c4f14c369b63fc633792fa62ae749fa18d78c9a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12105 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `d3b9ef6190ceab36538bfaa345496e196022a72a4e83b2075fc61772a7f9bcb9`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4993 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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