PDF malware analysis — malicious · f83923b46483a9eb

MALICIOUS

PDF

11.6 KB

MD5: 813189c02a684275ce16a523521e81e0 SHA-1: ec38bb8056b45fb3493f0112d194a7524bfa21ca SHA-256: f83923b46483a9eb999249a9b298937f286070b6b25d19c8426ec9b0c49b6428

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious File

The critical heuristic CVE_2007_5659 indicates the exploitation of a known PDF vulnerability using embedded JavaScript. The JavaScript is obfuscated and uses String.fromCharCode, typical of exploit delivery. The ClamAV detection further confirms the malicious nature of the file. The primary attack vector appears to be the exploitation of CVE-2007-5659 via embedded JavaScript to achieve arbitrary code execution.

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` `79a290b11b2ac76010b82c67b09367c6ef4b0853562da0f4181e14167dfb7259`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	11929 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `adc6df1f7e44791013c04a3a45c1eba681a268b29aebe60eb1857ca2c0bcbb85`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	4930 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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