Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8a97e44ab2ca0af…

MALICIOUS

PDF

45.6 KB Created: 2021-06-11 12:27:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 39178a70839da8e7fa86dff57bb12443 SHA-1: d02f2fb9f34cecd8f3f08a6ef07e62dd70bb2372 SHA-256: d8a97e44ab2ca0af4e3b18b9894e175270c1584ecdf8c79a828c82a90409e91a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, masquerading as game hacks and generators. The primary lure URL is https://netcdn.tw/app/431946152/roblox-btools-hack-2021-game-hack, which is designed to trick users into downloading potentially unwanted or malicious software. The document body and embedded URLs reinforce this lure, suggesting a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.tw/app/431946152/roblox-btools-hack-2021-game-hack In PDF document text
    • http://opac.acehresearch.org/repository/free-coin-master-androd-cheats-2021_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/hacks-forbee-swarm-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/haktuts-coin-master-today_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/coin-master-tool-hack_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/games-that-can-be-hacked_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/free-no-trial-create-decals-for-roblox_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/aristois-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/coin-master-hacks-no-verification_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/discord-king-of-queen-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/facebook-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/free-robux-today_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/prisonbreaker-hack-script-roblox-pastebin_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/roblox-free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/roblox-hack-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/coin-master-free-spins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/minecraft-com-free_GM479516143.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/minecraft-packs-free_GM479516143.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/free-robux-easy_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
stream_004_off000052aa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52AA 26412 bytes
SHA-256: 72245faab24ac34663e733413b0dc8faa26cf1d68cdddf6fcd6e6e0c0e4fc0d1
font_01_sfnt_off00008e4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E4C 18688 bytes
SHA-256: bfe7c6706ef0e72f15aa3608b06f83df5e2ca37d6c34c75d9f960583887002e0

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