Malicious PDF — malware analysis report

Static analysis result for SHA-256 b41805b42ecb260c…

MALICIOUS

PDF

46.2 KB Created: 2021-05-17 08:02:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7355b52bcd8855f04e80895310c4f433 SHA-1: 73aaf65ef7e189b2961105e5f4c1e8676006b406 SHA-256: b41805b42ecb260c55451f0350d90d69e9eb0e2359616d4b296a787c8664e4bb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites offering game hacks and in-game currency generators, such as 'freespins-coin-master-game-hack'. These links are flagged as malicious redirectors. The document body also contains a call-to-action phrase, 'CLICK HERE TO ACCESS COIN MASTER', reinforcing the lure. While no scripts were explicitly extracted, the nature of the links and the heuristic firings suggest a phishing or scam attempt designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/freespins-coin-master-game-hack In PDF document text
    • http://msfs-eastafrica.com/images/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/how-to-hack-coin-master-spin-ios_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/roblox-robux_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/roblox-avatar-maker-free_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/robux-free-co_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/free-headless-head-roblox_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/daily-free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/roblox-data-breach_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/download-apps-for-robux_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://msfs-eastafrica.com/images/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000046e7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46E7 24636 bytes
SHA-256: bc6de674545d9dde575ea9d8fddae438506c4aa39bf5e478a98f83172227a166
font_01_sfnt_off00007ecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ECF 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_02_sfnt_off0000935a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x935A 17884 bytes
SHA-256: c31d741d4f965ff4f04c8652eedf0010194718e591e89cbf3157ab9f7afc750f

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