PDF malware analysis — malicious · a9f8b51d2b0bb574

MALICIOUS

PDF

9.2 KB

MD5: 995e0c91df90d819a40467d2cda14e52 SHA-1: 8c704b8c62aa584395ff95603ae621583a102f9d SHA-256: a9f8b51d2b0bb574a559cd87cb4e388ef34f76aa6678f28ad55b12c392b8eec5

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 with the signature Pdf.Exploit.Agent-35905. Critical heuristics indicate the exploitation of CVE-2007-5659 via the Collab.collectEmailInfo method, which involves JavaScript execution. The extracted JavaScript files suggest a multi-stage process, likely involving the download and execution of further payloads.

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` `b2cd2c944d0f96d965e6947bd3a23a9b33d14430cfe67f8bc94dcfd0eb0c9fbc`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	11858 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` `17b2b5c4714063d5adfd20e788ab0ecad306018d8cb8cf46de7a2f571483f613`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	4965 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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