Malicious PDF — malware analysis report

Static analysis result for SHA-256 d75d839aee53a5af…

MALICIOUS

PDF

39.5 KB
MD5: 9ce4de63ff4c8d5e444b5822b12a68cf SHA-1: f8402908da2fce4d72fcb3579402983ba0b26782 SHA-256: d75d839aee53a5afeaf7fdd8db7f8e2b828042c9ca058cd280f8a509e0776b46
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a JavaScript action that likely attempts to download a second-stage payload. The document is an image-only lure, typical of phishing, and a critical heuristic identified a direct link to a payload disguised as a PDF invoice. The embedded JavaScript stream is the primary mechanism for delivering the malicious content.

Heuristics 4

  • PDF link points directly to executable/archive payload critical PDF_DIRECT_PAYLOAD_LINK
    PDF contains a clickable HTTP(S) URI whose path ends in an executable, script, shortcut, disk image, or archive extension. Documents can legitimately link to installers, so this is a high-risk delivery indicator rather than a standalone exploit fingerprint.
    URL https://accounts-bookings.vercel.app/#invoice-1645080830.pdf?invoice.booking.com
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 39 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
    URL http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/
  • 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)

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00009a0e.js
7d4181f8dc8c2aa513bb43d3af1820ac88d4e544ff9cb04e8b88827faeea9c5c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x9A0E 869 bytes

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