PDF malware analysis — malicious · d2962131e3789673

MALICIOUS

PDF

3.0 KB

MD5: 67088272a0249b2e6f82017e33aaea65 SHA-1: 9d9c8c2396269e28500b58c37c5c94957adac834 SHA-256: d2962131e378967371adad707bcdc7a9f775a90e42568e67ef90d7a58595a25e

86 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The ClamAV detection 'Pdf.Exploit.Pdfka-32' strongly suggests a known PDF exploit. The embedded JavaScript stream, named 'javascript_obj0009_000.js', is likely responsible for executing the exploit. The primary function of this script appears to be downloading and executing a second-stage payload, as is common with this type of attack.

Heuristics 5

ClamAV: Pdf.Exploit.Pdfka-32 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Pdfka-32
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0009_000.js` `c590a007e287b88fcf40289719b248bceab2411d5f07c84a2f5a4570a3d45869`	pdf-javascript-stream	PDF /JS object 9 at offset 0xD6	21281 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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