Malicious PDF — malware analysis report

Static analysis result for SHA-256 921eb4a6a78d7f51…

MALICIOUS

PDF

42.0 KB Created: 2021-05-13 07:10:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f9e84abceb358b359e5e3aba98fdce5d SHA-1: 9bfe74c9b603bb2a5d7d9c970fb166a37704446d SHA-256: 921eb4a6a78d7f51e160f2a816fe0d4ccb72415c4febc0ee1d9fd25a4bd454b5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically promoting "free generators" and "game hacks" for popular games. The primary lure URL is https://netcdn.xyz/app/406889139/get-coin-master-spins-free-game-hack, which is part of a network of sites distributing similar lures. While no scripts were extracted, the presence of embedded URLs and the nature of the lures strongly suggest a phishing or scamming attempt, likely leading to further malware downloads or credential harvesting.

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/get-coin-master-spins-free-game-hack In PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-roblox-shirts-templates_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-hack-tool_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/cheats-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/hack-coin-master-1_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/get-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-hack-using-cheat-engine_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/get-free-roblox_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-e-free_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-money-hack_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/roblox-character-free_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-private-minecraft-server_GM479516143.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/coin-master-hack-iphone_GM406889139.pdfIn PDF document text
    • https://vierabyragazze.com/upload/files/free-robux-codes-no-verification_GM431946152.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_off00004a1d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A1D 25076 bytes
SHA-256: c75373dee4637a9ad81cc4d982fb6ceba65e1dda8161159052bbe7241f8d3797
font_01_sfnt_off0000830a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x830A 17884 bytes
SHA-256: 876927319d3d02f2246654e6bcbdf62d71497dcf4510b2be4e7f27a5ee8d82be

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