PDF malware analysis — malicious · c42d34a5f669f491

MALICIOUS

PDF

3.0 KB

MD5: 8cd89fee0172067178fdb00652cbd873 SHA-1: 8ea6050683acbed0fbcbc06e7b1ee3e396e877fb SHA-256: c42d34a5f669f49109cf81b5daff9ee3b1b6ddc482a03ad92e1af6905b71ca2c

86 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream, named 'javascript_obj0009_000.js', is likely responsible for downloading and executing a second-stage payload, as suggested by the ClamAV detection 'Pdf.Dropper.Agent-1828977' and the 'Suspicious extracted artifact' heuristic. The use of String.fromCharCode further suggests obfuscation within the JavaScript.

Heuristics 5

ClamAV: Pdf.Dropper.Agent-1828977 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-1828977
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` `d4fde046e9d3ab91534e479a3d0bc7ae81e71200ae3c0f3a2c6622645b37ca71`	pdf-javascript-stream	PDF /JS object 9 at offset 0xD6	20985 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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