PDF malware analysis — malicious · 6a06fd6cf886814a

MALICIOUS

PDF

133.0 KB

MD5: d0d4b5a1ed023a194d478676d9846112 SHA-1: eb28a39bdfd72e9e8eac5f27d130ba64b70b0e21 SHA-256: 6a06fd6cf886814afec199027a9e6a18b44f97273219a7c273f09bb9c11f3ce9

86 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript that is configured to launch an embedded file upon opening, indicating a dropper functionality. The 'PDF_JS_EXPORT_LAUNCH_DROPPER' heuristic confirms this behavior. While the document body is unreadable, the presence of JavaScript and the dropper heuristic strongly suggest an attack pattern involving the execution of a secondary malicious payload.

Machine Learning

Nyx PDF Classifier clean score 0.2215

Heuristics 5

exportDataObject + nLaunch — embedded-file launch-on-open dropper critical PDF_JS_EXPORT_LAUNCH_DROPPER

PDF JavaScript calls exportDataObject() with nLaunch set, which extracts the document's embedded file and launches it in its default application. This is a launch-on-open dropper: the embedded file is the payload. No benign workflow auto-launches an extracted PDF attachment. (matched in decompressed stream)
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
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. (matched inside decoded stream)
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. (matched inside decoded stream)
PDF paints image(s) but contains no text operators info PDF_IMAGE_ONLY_LURE

PDF has 2 image XObject(s) and the content stream contains no text-emitting operators (BT/ET, Tj, TJ, ', ") in either raw bytes or decompressed streams — this is the screenshot-as-PDF pattern used to bypass text-based scanners and to deliver instructions purely through rendered pixels. It is informational unless paired with invisible links or risky URI context.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_file_obj0034.bin` `6c21fb87a14eb312683c6026392b61c791c6e2643d4e80162d7326511105e4a3`	pdf-embedded-file	PDF EmbeddedFile object 34 at offset 0x1BC87	21390 bytes
`stream_018_off00020ff9.bin` `8506007ffe19b76b5d6d8f2989bfbe1b1bd07144f943f913adc6e252851ba3b2`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x20FF9	1154 bytes

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