Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9ec05d37895b69d…

MALICIOUS

PDF

39.3 KB Created: 2021-05-21 04:36:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d7075dc2ab57536d4fc6eb0ad7f44851 SHA-1: d61628ff16faa8c5c1de2b2654c9a4be39d06480 SHA-256: d9ec05d37895b69d8f328deeef82bd2b9c584f7cb9f77dccdc94de08ef708681
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'blox.pink'. The document body and embedded artifacts suggest a lure related to 'Robux' or game hacks, aiming to trick users into clicking the malicious link. The ML classifier also strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9476

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 https://netcdn.xyz/app/431946152/blox.pink-free-robux-game-hack In PDF document text
    • https://www.hobbypcb.com/images/facebook-coin-master_GM406889139.pdfIn PDF document text
    • https://www.hobbypcb.com/images/get-free-spins-on-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • https://www.hobbypcb.com/images/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.hobbypcb.com/images/bux-free-robux_GM431946152.pdfIn PDF document text
    • https://www.hobbypcb.com/images/100-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000033ef.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33EF 31500 bytes
SHA-256: 9fbc4eaa4b553346db407bbe8d418469710232c7d7a96057f9d81dcabf27ed90
font_01_sfnt_off000077bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77BD 18620 bytes
SHA-256: 20ad8a2126bb9f489cd4862944fdd8c1c01869fd803457c3ce1390bedb89f69f

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