PDF malware analysis — malicious · 3946fad0a47c25b1

MALICIOUS

PDF

9.2 KB

MD5: 28d6a6ca631452566c6de3067ccb2853 SHA-1: 818bc05f9fc03621afcff5810e31dcc84defdb51 SHA-256: 3946fad0a47c25b1f4bec7b54affd5d3b887f071f9864abe4975fc0c80d59d71

180 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript that is obfuscated and uses the unescape function, indicating malicious intent. The critical heuristic firing for CVE-2007-5659 confirms the exploitation of a known PDF vulnerability. The embedded JavaScript is likely designed to download and execute a second-stage payload, as suggested by the deobfuscated JS streams and the ClamAV detection signature '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` `c96901c69c1b814101316e2880397b07867a9ea08b08d05ade527e61b8b3956c`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	12095 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` `71bdb13a9681ead1522c6a43f33551ca627d76d0d049b720aba3636302144ec5`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	5026 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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