Malicious PDF — malware analysis report

Static analysis result for SHA-256 679f829ea37c2df2…

MALICIOUS

PDF

45.3 KB Created: 2021-06-03 14:08:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 93c0eae3670d4e0510955b152f6b2790 SHA-1: 3654f5e0a23b969135ebdfbcb5fefc8dfad51054 SHA-256: 679f829ea37c2df2fa9bbfb16afd7de0d41b40fab72551cfba46e0b1a43918a0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a URL pointing to a "Coin Master" hack, and the document body includes a similar link and text suggesting a download lure. The ML classifier also flagged the PDF as malicious. These indicators suggest the document is designed to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/406889139/coin-master-heaven-free-daily-spins-game-hack In PDF document text
    • https://library.sman1berau.sch.id/repository/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-crossed-out_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/synapse-roblox-free_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/is-java-minecraft-free_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-spin-link-daily_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/pubg-uc-event_GM1330123889.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-get-free-tiktok-followers-without-human-verification_GM835599320.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/pokemon-go-free-legendary-pokemon_GM1094591345.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-do-you-get-free-robux-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_004_off00005426.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5426 25152 bytes
SHA-256: 390c3efd646fcea7bd857c3e4419db83f6a0aae6364941c09b00727bd3f49bef
font_01_sfnt_off00008e05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E05 18420 bytes
SHA-256: 3ecb90ef472e5e2f59c65ed4968a9b56eea25dc0e2c6a87bd992ad99bf12be05

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