Malicious PDF — malware analysis report

Static analysis result for SHA-256 91036b4590084e84…

MALICIOUS

PDF

48.8 KB Created: 2021-06-08 11:49:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 18df9bb5b9465b3ed0c6186585491801 SHA-1: 271cf8c24e1cd24438f4a679d1de6976c65cc558 SHA-256: 91036b4590084e84946131534f6ff36094ec88a2697c793e1dd8dcb47eb7e66c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, disguised as a lure for game hacks. The primary link, https://netcdn.tw/app/431946152/how-to-hack-in-entry-point-roblox-game-hack, is identified as a malicious redirector. The document body and heuristics indicate a social engineering tactic to drive users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/how-to-hack-in-entry-point-roblox-game-hack In PDF document text
    • http://grugliascogiovani.org/images/roblox-hacks-for-mac_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/minecraft-pe-free-download-ios_GM479516143.pdfIn PDF document text
    • http://grugliascogiovani.org/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-tiktok-likes-no-human-verification-or-downloading-apps_GM835599320.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-coin-master-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://grugliascogiovani.org/images/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-minecraft-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-minecraft-maps_GM479516143.pdfIn PDF document text
    • http://grugliascogiovani.org/images/coin-master-hack-apk-free-download_GM406889139.pdfIn PDF document text
    • http://grugliascogiovani.org/images/robux-website_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/roblox-anime-girl-patrol-tsundere-red-demo-script-hack_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/roblox-devil_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://grugliascogiovani.org/images/roblox-cheat_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005255.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5255 26612 bytes
SHA-256: 08591b231e7e0e96a2d05ba316b7969a06696c7ac2edf8fbb498e970f17b545e
font_01_sfnt_off0000904b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x904B 2852 bytes
SHA-256: e9630f3bb738ae3bc329a423cf069c8035d70ce2227e3557c42815f85ad3284f
font_02_sfnt_off00009a0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A0D 18904 bytes
SHA-256: 2110d67b8cef5a284d5e8df23fa85d2507d2d9898f1b0c65f45c146ec37f7873

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