PDF malware analysis — malicious · 4d6db854d6cf61a8

MALICIOUS

PDF

9.4 KB

MD5: bd77c5a181c307d45d88164d51169da9 SHA-1: 8bdcd43d98566aa282d4f3b3a8bcbc41038ff2d0 SHA-256: 4d6db854d6cf61a828839ee298786cfee43999238767d47b07cd1d823dda3792

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious JavaScript

The critical heuristic CVE_2007_5659 indicates the exploitation of a known vulnerability in PDF documents. This vulnerability is leveraged to execute embedded JavaScript, as evidenced by multiple PDF_JAVASCRIPT and PDF_JS heuristics. The deobfuscated JavaScript streams suggest the execution of malicious code, likely to download and execute additional stages. The ClamAV detection further supports the malicious nature of the file.

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` `11435e770148dafb91694dfb8f7af295464bb3fdaab2fbd6029f2a448a866357`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	12109 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` `daf6568c5aadbe0e0a7d61f44edfd2aec149967f1433603dd0066f8b5912919b`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	5076 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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