PDF malware analysis — malicious · 2aab307ce2ac2f4b

MALICIOUS

PDF

11.4 KB

MD5: bce3b3906e3e7e72ba4a49e861d94be1 SHA-1: b15a0427851b96c262edece821884399fcc7bef4 SHA-256: 2aab307ce2ac2f4beb8c9cb2afdccbf8acb9316c772406d7a0bf7f1561b2c71d

146 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution T1059.001 Command and Scripting Interpreter: JavaScript

The critical heuristic CVE_2007_5659 indicates exploitation of a vulnerability in Adobe Reader via embedded JavaScript. The JavaScript is heavily obfuscated but appears to be designed to download and execute a secondary payload. The presence of multiple embedded JavaScript files and the ClamAV detection further support this assessment. The exact nature of the second-stage payload cannot be determined from the provided evidence.

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-36079 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36079
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
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` `ef8bdac794684ae9cd4eb7091d80e1c5ca478c06c639d72d01626c1f7ce78b6d`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19C	578 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` `c7d2a7d44195d4628595061b711778fbb28bca4a8b32a0b20c1cee32790c4bf5`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	11960 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `7a06e96d8708aeac9535ce49076370fa0f05f2c232a235b3b443208bdc22bc7c`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	4932 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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