Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad5d8f792ebde4a4…

MALICIOUS

PDF

25.7 KB Created: 2021-06-30 05:36:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a6f553941c7a45143c2fe4ab695fde40 SHA-1: 9484cfc5107557bad95941489590947084427e08 SHA-256: ad5d8f792ebde4a4bf7eeb8d5aaa44648e45f9d60ad389e0d5f8002d351c8121
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game currency and cheats to entice users into clicking malicious links. The primary link directs to a known malicious redirector infrastructure, which in turn hosts further malicious PDF files. The ML classifier strongly indicates maliciousness, and the embedded URLs confirm the redirection and phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 3

  • 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.
  • 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-robux-credit-card-free-2021-game-hack In PDF document text
    • http://lib.kunci.or.id/repository/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/new-cheat-codes-for-adopt-me-on-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-minecraft-skins-pc_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-rewards-site_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/i-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/minecraft-bedrock-free-server-hosting_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-hack-free-roblox-with-kali-linux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/card-codes-for-free-generator-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/safe-hack-for-coin-master-android_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-roblox-gift-card-codes-2021-unused_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-4-mobile-24-com-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-easy-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/my-minecraft-account-was-hacked_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-minecraft-mods_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000303f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x303F 22620 bytes
SHA-256: 6bbf0648591e37a82daab450322f2c497225cf713190339408d26a98c6fa82ca

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