Malicious PDF — malware analysis report

Static analysis result for SHA-256 be3ef77fd72e49d5…

MALICIOUS

PDF

36.3 KB Created: 2021-06-30 06:46:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7b89d363ae5ebdca79378e281656a280 SHA-1: c907dafb5d86ec80bb2227ce4e9ff436173de81b SHA-256: be3ef77fd72e49d5aa10e8efd81c5e8fd0dd0be8fc2fda437c18888fd1182fdc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and lures users with promises of free game items and hacks. The primary malicious URL identified is http://netcdn.co/app/431946152/roblox-free-items-promo-codes-2021-game-hack. The document's structure and embedded links strongly suggest it is designed to trick users into visiting malicious websites, likely for credential harvesting or further malware distribution.

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.co/app/431946152/roblox-free-items-promo-codes-2021-game-hack In PDF document text
    • https://www.sd-olimp.hr/files/free-attacks-on-coin-master_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/password-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/earn-roblox-free_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-roblox-avatar-gear_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-tiktok-fans-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/free-robux-com_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • http://sd-olimp.hr/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • http://sd-olimp.hr/files/how-to-get-free-robux-and-tix-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/roblox-airjump-hack_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/hack-to-send-gold-cards-on-coin-master_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/free-roblox-items-2021_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/roblox-prompt-player-free-model-purchase_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/heroes-online-roblox_GM431946152.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/coin-master-no-download-app-but-play-for-free_GM406889139.pdfIn PDF document text
    • https://www.sd-olimp.hr/files/roblox-fun-com-robux_GM431946152.pdfIn PDF document text
    • http://sd-olimp.hr/files/coin-master-instagram-free-spins_GM406889139.pdfIn PDF document text
    • http://sd-olimp.hr/files/hacks-for-roblox-working-weapons_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
font_00_sfnt_off0000344d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x344D 22544 bytes
SHA-256: 48791fd8072f5026f903fa4ab81ff247c6399c36bc6b41d30649a2ec45a35fd5
font_01_sfnt_off000066a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66A7 19744 bytes
SHA-256: 80a49e2661bddad55e881f1d6215a540b99a524b5f5c36e1aaa7d2bdcb953ecc

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