Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3f2e178e2385924…

MALICIOUS

PDF

42.1 KB Created: 2021-05-14 02:52:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 76154d3f2381942fd4a9cd7e04745627 SHA-1: 7420f0b3e552780887544bf27ddea83712c9707b SHA-256: a3f2e178e2385924ceed92aee66474466c75c0b73d6b68138a2f25a197fae7d8
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on what appears to be a game hack or generator. The primary link, https://netcdn.xyz/app/406889139/coin-master-update-2021-game-hack, is identified as a malicious redirector. The document's content and heuristics strongly suggest a phishing or scam attempt to redirect users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • 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/406889139/coin-master-update-2021-game-hack In PDF document text
    • https://www.hobbypcb.com/images/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • https://www.hobbypcb.com/images/coin-master-free-coins-amp_GM406889139.pdfIn PDF document text
    • https://www.hobbypcb.com/images/how-to-get-free-robux-without-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://www.hobbypcb.com/images/free-role-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.hobbypcb.com/images/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • https://www.hobbypcb.com/images/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://www.hobbypcb.com/images/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • https://www.hobbypcb.com/images/moonactive-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://www.hobbypcb.com/images/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.hobbypcb.com/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.hobbypcb.com/images/free-robux-quiz_GM431946152.pdfIn PDF document text
    • https://www.hobbypcb.com/images/coin-master-35-13-hack-download_GM406889139.pdfIn PDF document text
    • https://www.hobbypcb.com/images/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://www.hobbypcb.com/images/how-to-get-robux_GM431946152.pdfIn PDF document text
    • https://www.hobbypcb.com/images/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • https://www.hobbypcb.com/images/coin-master-generator-free_GM406889139.pdfIn PDF document text
    • https://www.hobbypcb.com/images/robux-adder_GM431946152.pdfIn PDF document text
    • https://www.hobbypcb.com/images/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.hobbypcb.com/images/roblox-gift-card-free-codes_GM431946152.pdfIn PDF document text
    • https://www.hobbypcb.com/images/is-there-any-tricks-or-working-hacks-for-coin-master_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_003_off000046b7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46B7 25456 bytes
SHA-256: 6783769e47a4fd25c81a76d8d22048646fa5e4395ba3daca5717237bf8238c67
font_01_sfnt_off00008163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8163 18484 bytes
SHA-256: 2d3a472fcc561fc481c0da5969c31466f96864982e6dea6036c3c65c06d6ed28

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