Pdf.Dropper.Agent-5341874-0 PDF malware analysis — malicious · 942a377f4a1fa685

MALICIOUS

PDF

4.1 KB

MD5: 527666e6b074566b157a9c06830f35de SHA-1: 03876b90ec8ad99a81bddbff1897c019f4329b50 SHA-256: 942a377f4a1fa685fac890298956d7abbe6f3668bb30b4ca93dd2ffb536b1f9d

128 Risk Score

Malware Insights

Pdf.Dropper.Agent-5341874-0 · confidence 95%

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The deobfuscated JavaScript stream, 'acroform_b64_00.js', likely contains code to download and execute a second-stage payload. ClamAV also detected this file as 'Pdf.Dropper.Agent-5341874-0', confirming its malicious nature. The presence of JavaScript and the dropper behavior are consistent with common PDF-based malware delivery techniques.

Heuristics 7

ClamAV: Pdf.Dropper.Agent-5341874-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-5341874-0
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)
PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED

The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PSEOF. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
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` `19117bb65bbd19d95a8850e349055642199f00d3eb8f107e60f1fc2e1d156f5f`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6369 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` `c13b64e5b01f14b02cf6117e0bde680548ddf35e76ccdd4bb6e5e7d0b53dffb9`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3622 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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