Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ea85217d86dacf5…

MALICIOUS

PDF

33.9 KB Created: 2021-07-06 00:20:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0cb29601e67b5ee586d1eefbd5c45c02 SHA-1: 37d34f0370ea492ebe80d51cda346db8eff6fe5e SHA-256: 5ea85217d86dacf59331a0ccbe25c6e86fd4a62082d261f7ee781c1c1f6f5673
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 them by promising game hacks or free currency. The primary link, http://netcdn.tw/app/431946152/instantrobux-game-hack, is identified as a malicious redirector. The document body and embedded URLs suggest a social engineering tactic to drive traffic to potentially malicious sites or download further payloads. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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/431946152/instantrobux-game-hack In PDF document text
    • http://pspmrsmbpulau.com/opac/repository/free-promo-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.pspmrsmbpulau.com/opac/repository/cheats-for-name-that-character-on-roblox_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/master-hack-coin_GM406889139.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/coin-master-free-download_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/coin-master-card-collection-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/collect-robux_GM431946152.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/free-roblox-outfits-2021_GM431946152.pdfIn PDF document text
    • https://pspmrsmbpulau.com/opac/repository/youtub-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.pspmrsmbpulau.com/opac/repository/noclip-roblox-cheat_GM431946152.pdfIn PDF document text
    • https://pspmrsmbpulau.com/opac/repository/how-to-hack-someones-account-through-team-create-roblox_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/free-script-executor-roblox_GM431946152.pdfIn PDF document text
    • https://www.pspmrsmbpulau.com/opac/repository/fat-dude-trying-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.pspmrsmbpulau.com/opac/repository/vehicle-simulator-money-hack-roblox_GM431946152.pdfIn PDF document text
    • https://pspmrsmbpulau.com/opac/repository/roblox-how-to-get-in-bloxburg-for-free_GM431946152.pdfIn PDF document text
    • https://www.pspmrsmbpulau.com/opac/repository/roblox-hack-no-survey-or-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.pspmrsmbpulau.com/opac/repository/roblox-hackfr_GM431946152.pdfIn PDF document text
    • https://pspmrsmbpulau.com/opac/repository/roblox-scrip-super-poderes-no-hacks-en-cualquier-mapa_GM431946152.pdfIn PDF document text
    • http://pspmrsmbpulau.com/opac/repository/coin-master-hack-tool-for-pc_GM406889139.pdfIn PDF document text
    • http://www.pspmrsmbpulau.com/opac/repository/robux-website_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
font_00_sfnt_off00002f12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F12 22204 bytes
SHA-256: 557d6b2aed8d6c2566ee8f0555dc1982287c81769cd96f506610f165246e6d64
font_01_sfnt_off0000602c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x602C 18656 bytes
SHA-256: 5a13a4ba7d4aa3ba564163d7fd1f4e40de414e0c8b16d10ac9018e4301010f0d

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