PDF malware analysis — malicious · b15f1149f9f2d124

MALICIOUS

PDF

4.1 KB

MD5: 516f76838cbd7cfeb8e7fca373384f33 SHA-1: 526241285dfebd517add9c4de31e2bdf1899f6a1 SHA-256: b15f1149f9f2d1249aa6f0b0d7fee2e1e817b0e3317308faf39068353ea3bdc5

126 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 critical PDF_EVAL heuristic firing, along with the presence of deobfuscated JavaScript files, suggests that the script is designed to execute arbitrary code. The ClamAV detection of 'Pdf.Dropper.Agent-7294071-0' further confirms its malicious nature. The script likely downloads and executes a second-stage payload, as is common for PDF droppers.

Heuristics 6

ClamAV: Pdf.Dropper.Agent-7294071-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7294071-0
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` `01e520ca5f6534f7730870a739daa6b53b4cf3c024d4de9fab2050434204850c`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6345 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` `1a8ec95c85c0724852601424a86d03bd60fd1048dce2b397d18dfefbe9d6ca70`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3604 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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