PDF malware analysis — malicious · 2d707c35122641cd

MALICIOUS

PDF

9.4 KB Created: 2009-09-19 13:46:37 Authoring application: RnyXYKVIpzMLgoznnz (via hQkJMHddckNDdDU)

MD5: 6a42f40b7093d812b021359568282cfe SHA-1: f75cf8296458eeb43540265c6703a108b5d285c0 SHA-256: 2d707c35122641cd1b607c8ebfa368ed316362ae04c9b0919fcd69dda8c3d5cd

156 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, identifying it as Pdf.Dropper.Agent-7244126-0. Static analysis revealed embedded JavaScript streams, including one that utilizes `eval()` and `String.fromCharCode()`, indicating obfuscated code execution. This JavaScript is likely responsible for downloading and executing a secondary payload. The document body contains nonsensical text, suggesting it is a lure.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

ClamAV: Pdf.Dropper.Agent-7244126-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7244126-0
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.
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_obj0007_000.js` `d3fcfbbd5d03c88f19f932ef2f6b9d8ebeef13316681f5ab8c904142d95d81bb`	pdf-javascript-stream	PDF /JS object 7 at offset 0x3C4	6455 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`javascript_obj0007_001.js` `ac5cabba63df8d3dd978c33285d77e3bb60db4a26d6231614ca93cb0872e8be8`	pdf-javascript-stream	PDF /JS object 7 at offset 0x3C4	2206 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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