PDF malware analysis — malicious · ce3c0521da894ffa

MALICIOUS

PDF

9.4 KB

MD5: 672e91fb54999d8f9f5b1655e15d01c5 SHA-1: dd1934239709b3b92eddfc32a1491b2f074ab10f SHA-256: ce3c0521da894ffa6633285ed9981ffc632afe0ad7547ad76773b30daa5eba3e

178 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 utilizes the unescape() function, indicating malicious intent. The critical heuristic CVE_2007_5659 specifically points to the use of Collab.collectEmailInfo for JavaScript execution, a known exploit vector. The file is also flagged by ClamAV as Pdf.Exploit.Agent-35905. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload.

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` `f67432f129e64fadeaf378f6f87e85e9c12953c0459f3cad8b9f0c1a056ae31c`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	11927 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` `2e1161c3d4045911f11350aa008e6fcf0e2027ce782976d7fb9d46201a67f0d1`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	5014 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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