Malicious PDF — malware analysis report

Static analysis result for SHA-256 a928dc1858524cd2…

MALICIOUS

PDF

44.9 KB Created: 2021-06-03 07:26:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5018e6815b8d54f20b203bb2092b60d0 SHA-1: 2d1a1729785dc2cd27a431e7b5c0d6de7cedf203 SHA-256: a928dc1858524cd2e51227836710bfdb6bf6ed03f3ee6ef65aeaf8aa98de9413
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and potentially unwanted content, masquerading as game hacks and free generators. The primary link, https://netcdn.online/app/479516143/how-to-get-minecraft-for-free-game-hack, is identified as a lure for game hacks. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious redirection, likely leading to further malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/479516143/how-to-get-minecraft-for-free-game-hack In PDF document text
    • http://jbtlive.com/assets/CKImages/files/how-to-get-free-coins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/minecraft-free-download-ipad_GM479516143.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/coin-master-15-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/how-to-get-100-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/minecraft-launcher-free_GM479516143.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/coin-master-free-spins-uk_GM406889139.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/coin-master-hack-version-download-2021-android_GM406889139.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/robux-gainer_GM431946152.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/free-roblox-acc_GM431946152.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/free-roblox-girl-hair-not-a-model_GM431946152.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/link-coin-master_GM406889139.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • http://jbtlive.com/assets/CKImages/files/earn-free-robux_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_004_off000054b9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54B9 25464 bytes
SHA-256: bf5c37e5cf48e7ae123dd8701b7a68c7065f4bee52f59a8dfba58f9db61102c4
font_01_sfnt_off00008e42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E42 17872 bytes
SHA-256: 6fa695b9296659f7eb743de2dcac64eb87e125e0d99966acf8bb7a2f268f66d6

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