PDF malware analysis — malicious · 207711f6f716d590

MALICIOUS

PDF

9.6 KB

MD5: 578caa34bca123eda01d1c93a900836f SHA-1: c976c13ccd374e3a0475d40f8085a5b0e80dc9f1 SHA-256: 207711f6f716d590fc401598ccdc12aef32b3bd89ffc9d9f0b97a9331d9a17ca

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, identified as malicious by ClamAV (Pdf.Exploit.Agent-35905). Critical heuristics indicate the exploitation of CVE-2007-5659 via the `collab.collectEmailInfo` method, which is used to launch JavaScript. The JavaScript streams are heavily obfuscated, but the overall pattern suggests the execution of a malicious payload. The exact nature of the payload is not discernible from the provided evidence, but the exploit chain is clear.

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` `e6043cdafe9b57db09fbc605fe81e3bd43862d225d813d01811116fced8d3d80`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	12276 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` `7278d43d6cb7b1dedc3d77ee4410985a826539c0db9aac67ee1d5eeb546f5c45`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	5133 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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