PDF malware analysis — malicious · 9b3fa4c133495029

MALICIOUS

PDF

11.9 KB

MD5: 9900e3b8336c1f28765687b620789b3b SHA-1: 9cf8aba9175375fdaeed25ddc9750a5ab02051f7 SHA-256: 9b3fa4c133495029e516852ff4c6933f562ace1fe27b1eb78e1aa1c2a8ddacb5

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious Link

The critical heuristic firing for CVE-2007-5659 indicates the exploitation of a known vulnerability in PDF readers. The embedded JavaScript streams, particularly the deobfuscated ones, suggest the execution of malicious code. The ClamAV detection further confirms its malicious nature. The primary attack vector appears to be leveraging a PDF exploit to run arbitrary JavaScript, which is then used to download and execute further payloads.

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` `30af56480ce3aed33287bde102bca4533af8e59be6f8b0e7c0967cd76097a19b`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	12385 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `aa17b15055b8a0fa67fd507342a7e7601bf424d1825928aaf54c4e8043d5c19e`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x36F	5082 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.