PDF malware analysis — malicious · ca8fb830a85fd2f1

MALICIOUS

PDF

4.1 KB

MD5: 8f8713ceec9336c8eba474043be19cde SHA-1: 4fcd02ff0965d2c18481cacd72cac9bbb5b6e5ec SHA-256: ca8fb830a85fd2f1d93de35c6526e16c037753630bc75e3855fee415cfbbadd1

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell T1204.002 Malicious File: Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The critical ClamAV detection of 'Pdf.Dropper.Agent-7303897-0' strongly suggests its malicious nature. The JavaScript likely performs actions such as downloading and executing a second-stage payload, as evidenced by the 'eval()' call and 'String.fromCharCode' usage within the decoded streams. The presence of obfuscated JavaScript streams further supports this dropper functionality.

Heuristics 6

ClamAV: Pdf.Dropper.Agent-7303897-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7303897-0
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_obj0013_001.js` `86ee0616f2b11009a591eb9d2cb41214320b350e71a89be94a5352e2422bf527`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6465 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`acroform_b64_00.js` `6e982c03f168ffd8a8651655dfd8f382f2226186dcf43813ae2a069136594819`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3694 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s).

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