Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bb1f1055bac32b9…

MALICIOUS

PDF

33.6 KB Created: 2021-07-08 15:23:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c55c8d26b97cf5659ac060c37a824f9c SHA-1: 99bca9a35629859c9193763497ef01d69ffc7032 SHA-256: 8bb1f1055bac32b9ec911a56fb352eed2ac4bad6bef592d5e01d36c2fcadb9eb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as "free generator" or "game hack" lures. The primary link, http://netcdn.tw/app/479516143/minecraft-classic-free-game-hack, is identified as a malicious redirector. The document body and embedded URLs suggest a social engineering attempt to trick users into downloading potentially unwanted or malicious software by exploiting interest in popular games.

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.tw/app/479516143/minecraft-classic-free-game-hack In PDF document text
    • http://www.ocic.hr/files/2021-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/coin-master-apk-mod_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/files/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/files/minecraft-for-laptop-free_GM479516143.pdfIn PDF document text
    • http://www.ocic.hr/files/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/ss-by-snape-2021-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • https://www.ocic.hr/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/files/earn-free-robux-online-2021_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/http-appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/files/roblox-super-power-training-simulator-hack-script_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/how-to-hack-into-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/hacks-and-cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/files/minecraft-free-download-ipad_GM479516143.pdfIn PDF document text
    • https://www.ocic.hr/files/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • https://www.ocic.hr/files/microsoft-store-robux_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/free-spins-promo-code-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/comapp-trekfree-coin-spindaily-link-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_off00002f74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F74 22668 bytes
SHA-256: fbd4dcd0e36bdf5fff170a1b7a93c0af7047e785a789e9b73d533d0fa67030e4
font_01_sfnt_off0000620b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x620B 17928 bytes
SHA-256: f5ae882fe2605c2402409cd3cb641bc0b4456540121854b01f6cb44cdc09e6e6

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