PDF malware analysis — malicious · c8ca2334ad52621e

MALICIOUS

PDF

8.1 KB

MD5: 5e02e58dd0e0cf9ecfb9cc30627f4410 SHA-1: b617d5837e0086a5bf6eae498353aa16d5bcbd04 SHA-256: c8ca2334ad52621e3e00694dfbeae2c4eecc5c23515e24e64610fae6efb94134

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of PDF_EVAL and PDF_FROMCHARCODE firings suggests that the JavaScript is obfuscated and uses eval() and String.fromCharCode to execute code. This pattern is commonly used to download and execute further malicious content. No specific family could be identified due to the obfuscation.

Heuristics 5

eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0004_000.js` `8af264a77123e05833cd3d7f418a1a90e2162cdcc507a9495194be75106635f0`	pdf-javascript-stream	PDF /JS object 4 at offset 0xE1	306 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `c04a0682b4ee2e1d1e97787104ce1598b05decb426afc02384f27bd0f996afa8`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1B19	1736 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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