PDF malware analysis — malicious · 19cce1b9f642ea81

MALICIOUS

PDF

11.8 KB

MD5: 0c0284a55d767b5b1850d315f35fcd6f SHA-1: 3ff4b4d3ce64ed69172dc18d0fb5cbb6ab475c18 SHA-256: 19cce1b9f642ea81a6e6f04d0f891b319a30285055e35e63081a7bc7dc5deb2b

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, which is a common delivery mechanism for exploits. The critical heuristic 'CVE_2007_5659: Collab.collectEmailInfo' indicates the exploitation of a specific vulnerability (CVE-2007-5659) within PDF documents. The embedded JavaScript is likely responsible for downloading and executing a secondary payload, as suggested by the 'deobfuscated-js' artifacts and the ClamAV detection signature 'Pdf.Exploit.Agent-36079'. The document body was unreadable, but the technical indicators strongly suggest an exploit attempt.

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` `631d230dbd8ff2f4ab67eee1738cb786fcf3da03099f6a86cdea5f1071030b3f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	12271 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `a27a4bd34c49f72b85229c093330b7011448f5e577020aeceb7390be2065944c`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	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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