Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcacfb6ff71f4417…

MALICIOUS

PDF

35.7 KB Created: 2021-06-29 00:57:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d485dad364b70a278faa9935ae0affa2 SHA-1: ceaab3df6775c80d7299495acf17f6a6fbf2945b SHA-256: bcacfb6ff71f4417ddd32af6eee9c4e439694d44f3ebd74be645328a3c70abe5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising 'game hacks' and 'free generators' for popular games. The primary lure, 'how-to-open-the-roblox-hack-menu-game-hack', points to a known malicious redirector. This suggests a phishing or scam attempt designed to lead users to potentially harmful content or further malicious sites.

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/how-to-open-the-roblox-hack-menu-game-hack In PDF document text
    • http://www.library.gkigadingserpong.org/repository/rare-free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-girl-hair-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/robux-now_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-spin-ml_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-free-coin-hack_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/husky-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-votekick-on-free-draw-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-working-roblox-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-hack-ios_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/easy-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/freecoins_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/get-free-coin-master_GM406889139.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_off000031db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31DB 22876 bytes
SHA-256: 70dd81d60eb81d63c5deff080a82e29d26c2abe942dfba7c2102320bb2cc4c4a
font_01_sfnt_off0000656c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x656C 19496 bytes
SHA-256: b73e61dc3562f09ae5b30ed7a5ef81ee02d73835d91f31530abf9741783469a0

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