PDF malware analysis — malicious · 8f9b2fdda1123a2b

MALICIOUS

PDF

9.4 KB

MD5: 52100a2cedb19e59a408a49cc44e6939 SHA-1: 3cc6cd457611d3d8f5c3c5a31ab139428ebe2f15 SHA-256: 8f9b2fdda1123a2b2ffbd0cfdcc743b8fa8550ebd5f882f87c867318e990ccd3

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The file is a PDF document that contains embedded JavaScript, which is a known technique for exploiting vulnerabilities. Specifically, the 'CVE_2007_5659' heuristic indicates the use of a vulnerability related to the Collab.collectEmailInfo function, often used to launch arbitrary code. The presence of multiple JavaScript streams and the ClamAV detection 'Pdf.Exploit.Agent-35905' strongly suggest malicious intent. The script's primary function appears to be downloading and executing a secondary payload.

Heuristics 6

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-35905 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35905
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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` `d8a6b4ad1abf04d0c4a4f89535cfb57f7312edef25c443f4e844c8ec9d0929dd`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	352 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `ce8b0669bd5867576505a828e666e98d509d9e67260b4eabe2b06a235e0abb54`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	12069 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `e9e1545bd188f35fc0388342ac2d38c61e08119ee08ff17c55f4d7bdaf7b8a24`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	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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