Malicious PDF — malware analysis report

Static analysis result for SHA-256 20cf828fc834a30e…

MALICIOUS

PDF

33.6 KB Created: 2021-06-29 01:01:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 29f2478a45ec89c65a8fd41b6d4a6350 SHA-1: 7a12226dd43e98b2d3d5aa662121d8ac37dd632b SHA-256: 20cf828fc834a30e4e53f5d7206790720a6826a6a564514876464b1abd743486
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appear to be game hack generators or free currency sites. These links redirect to known malicious infrastructure, indicating a phishing or scam attempt. The document body and embedded URLs strongly suggest a social engineering pretext focused on popular online 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.co/app/431946152/roblox-script-cheat-game-hack In PDF document text
    • http://library.acehresearch.org/repository/how-ot-get-free-robux-not-clickbait_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-group_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/get-free-robux-denis_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-extra-spins_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-game-pass-for-free-roblox-youtube_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-hacks-2021-jailbreak_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-bee-swarm-simulator-free-diamond-eggs-codes_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-coin-master-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/spin-coin-master_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-no-offers-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-that-is-free_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/wwwfree-robuxcom-free-robux-now_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-game-hack-apk_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/hack-de-roblox-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-legally-get-free-spins-in-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_off00002c8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C8A 22288 bytes
SHA-256: b90c4cd439934ffde92c197dbe319799eaeeb852cbad48491d5b14b7b03df692
font_01_sfnt_off00005e12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E12 19052 bytes
SHA-256: 3091c7e5f39b9c9575b4c119e58ac121f132c82b0b1393f1124c0d3e1b1225dd

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