PDF malware analysis — malicious · a070a4159845b647

MALICIOUS

PDF

4.0 KB

MD5: 67d1030dc7d395a0a7445c7d70bfcef2 SHA-1: 0de6b47f7342ad50e6c76d0b1fece5c458e532e4 SHA-256: a070a4159845b647f13e48f937e752a27ccf94be96e2147b61c16979aecfda53

126 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 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-5343103-0' further confirms its malicious nature as a dropper. The script likely downloads and executes a second-stage payload, although the specific URL or payload could not be reconstructed from the provided evidence.

Heuristics 6

ClamAV: Pdf.Dropper.Agent-5343103-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-5343103-0
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` `3b67129396d4b01c0c645fc9ceec7424ae418e4822023678ac56aacfca57e009`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6333 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` `9ca8cbe69b7d603713c0021d929772d4aadb6b24c8cd429390ce649e7fd10c09`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3595 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 7 long base64-like blob(s).

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