Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d073e09f82b5060…

MALICIOUS

PDF

8.2 KB
MD5: 3b12cf783595d26c2775cf187580304c SHA-1: 653ffaa9cd506430bcf1702782c5ef32ddb55616 SHA-256: 1d073e09f82b5060bb3514875a4a1c0cc333ce33dc2e2952a787f1bf700daa53
64 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of an eval() call within the JavaScript stream (PDF_EVAL) suggests code execution. While no specific malicious URLs or scripts were directly extracted, the combination of these indicators points to a likely exploit attempt to download and execute a secondary payload. The benign URLs found do not detract from this assessment.

Heuristics 5

  • 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. (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)
  • 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)
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000004b5.bin
4447bc3bf2370788a868beaf4e818cbde6061d04686c8a8695d700584551fe2b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B5 4794 bytes
objstm_0013_00.bin
3ec841b01a1bb1aa700b49a4f383b3c25444c501028558ea845e84b840f95f4d		 pdf-objstm-decoded PDF /ObjStm 13 0 obj (inflated) 171 bytes

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