PDF malware analysis — malicious · e496072e42a060d8

MALICIOUS

PDF

11.7 KB

MD5: 7eb98f9c5bb32c99c19b8e885c11ed7c SHA-1: 450a828f15d2931aae24d71369b422c9a02ada59 SHA-256: e496072e42a060d8913f9514db99654b4159b9c5d01e6a725f811c91d4dca556

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link or Macro: Malicious Link T1204.002 Malicious Link or Macro: Malicious Macro

The file is a PDF containing embedded JavaScript, which is flagged as malicious by ClamAV (Pdf.Exploit.Agent-36079). The critical heuristic CVE_2007_5659 indicates exploitation of a known vulnerability via the Collab.collectEmailInfo method. The JavaScript is obfuscated and uses String.fromCharCode, suggesting it's designed to download and execute a second-stage payload. The presence of multiple extracted JavaScript files further supports this.

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` `1db482f97ca52a0c8d54fef9c6df1a7fe5c0083fb37d6dfb0cd6aaa519c04166`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	12428 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `b165ef7bd6a1cd5b51151726e5ed1525b7dbb9ab5eb8787e2bdf375435fd8104`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	5206 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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