Malicious PDF — malware analysis report

Static analysis result for SHA-256 70c976218f1ee2de…

MALICIOUS

PDF

33.9 KB Created: 2021-07-05 08:37:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1b0b5f736a22bccd2c29becdc525a367 SHA-1: 8410bf256919bb97b54043c1a65e684577b4df70 SHA-256: 70c976218f1ee2defb62579d1718165fa905fdd358a7f8540c972c528c4f9cec
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for game hacks and free robux, directing users to malicious redirector infrastructure. The primary URL, http://netcdn.tw/app/406889139/coin-master-hack-tool-generator-game-hack, is flagged as malicious and part of a redirector chain. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to trick users into downloading further malicious content or visiting scam pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-hack-tool-generator-game-hack In PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/ore-tycoon-2-cheats-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-rewards-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-the-antine-villa-roblox-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-gift-card-cods_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-free-spins-8-14-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/pokemon-go-font-free-download_GM1094591345.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-free-clothes-pastebin_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/download-coin-master-apk-hacked_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/are-the-surveys-for-free-robux-real_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/minecraft-for-free-apk_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/buy-free-roblox-accounts-2021_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_002_off0000303b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x303B 22484 bytes
SHA-256: eade3a0baf1d2e0c4b0b811da33a172aea68a8ec4a18c053fb0329363ecd877a
font_01_sfnt_off00006250.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6250 18080 bytes
SHA-256: c46316e90b4f0ac98e0e5a3e6b6d711d9ca832fa33b0d16712c7769e3b51dbdf

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