Malicious PDF — malware analysis report

Static analysis result for SHA-256 3dd9e2b1ffc0519c…

MALICIOUS

PDF

47.8 KB Created: 2021-06-04 01:28:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-26
MD5: 60e02f2ca28ebcec8e91d5c48d5bfaad SHA-1: d37e9bb54f8f344615cf205f996725c108f68e6a SHA-256: 3dd9e2b1ffc0519c1f923b25a2d7294848b5e1175d5a5377f695c915ef1b5533
208 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 6

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.online/app/431946152/rbx-hut-promo-codes-game-hack.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/431946152/rbx-hut-promo-codes-game-hack In PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/how-to-hack-coin-master-computer_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/hacks-master-coin_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/coin-master-free-spins-today-daily-links_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/coin-master-hack-download-ios_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/coin-master-free-spin-link-today-50_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/offers-to-complete-and-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/get-free-spins-link-in-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/mcpe-optifine_GM479516143.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/how-to-get-free-roebucks-without-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/pokemon-go-free-2021_GM1094591345.pdfIn PDF document text
    • http://pustaka.stikesperintis.ac.id/repository/minecraft-tiktok-hacks_GM479516143.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_004_off000052fa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52FA 26008 bytes
SHA-256: 55dc2a6c8b1b5d545a85112527fbc507fb0e039e9ae3fdcb091611867f7f9357
font_01_sfnt_off00008d88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D88 2824 bytes
SHA-256: 1d0cb1023eaa225682b8e7a2c8df4e4c96545ba7eedaf3d9844e51183e9ca189
font_02_sfnt_off00009735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9735 18544 bytes
SHA-256: 3932e00da52bee9380420d38fb2034f39e9e0515dfd29b0dacfc54573cc91d35

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