PDF malware analysis — malicious · ab4266a83fd0e042

MALICIOUS

PDF

9.4 KB

MD5: 038620aea2c575a2773a76fafd7567da SHA-1: 2828d501c6632104f0c3fac66a186c15368f730d SHA-256: ab4266a83fd0e0428d186b2abd9ccad27e994f0af3890264f9f8b04231651bc0

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File T1059.003 Windows Command Shell

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability via the 'collab.collectEmailInfo' method. This technique is commonly used to download and execute arbitrary code. The presence of multiple deobfuscated JavaScript streams indicates a complex execution chain designed to evade detection. The file was detected by ClamAV as Pdf.Exploit.Agent-35905.

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` `407b9f9bb2dd227e425dbf79beaa1e53433155a5e90ce0151b3d096f4959cab0`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	12158 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` `10658c9597b77caf06ce2a021ab2649b8a4c6e2a7e3f8b8d5d252cd6dc4a1227`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	4998 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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