Malicious PDF — malware analysis report

Static analysis result for SHA-256 e15b40d6377c64e3…

MALICIOUS

PDF

47.0 KB Created: 2021-06-08 22:44:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 37d703cac7f1fa14a8b73da161461f67 SHA-1: 511c0a738a35a2b2062a86a1c085ce6889399f61 SHA-256: e15b40d6377c64e38e48ff47ee03b1a8749f4e07dc84fac0ebcbd7175689b066
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to malicious infrastructure, masquerading as game hacks. The primary lure URL is https://netcdn.tw/app/431946152/roblox-jailbreak-hack-2021-game-hack, which is flagged as a malicious redirector. The document body, though heavily obfuscated, contains references to game hacks and download prompts, reinforcing the lure. No scripts were extracted, but the presence of multiple malicious links indicates a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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-jailbreak-hack-2021-game-hack In PDF document text
    • http://grugliascogiovani.org/images/teach-me-to-hack_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • http://grugliascogiovani.org/images/www-robux-us_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/how-to-change-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/coin-master-gold-cards-hack-english_GM406889139.pdfIn PDF document text
    • http://grugliascogiovani.org/images/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://grugliascogiovani.org/images/coin-master-hacks-for-iphone_GM406889139.pdfIn PDF document text
    • http://grugliascogiovani.org/images/how-to-get-free-tiktok-followers_GM835599320.pdfIn PDF document text
    • http://grugliascogiovani.org/images/best-admin-hack-roblox_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://grugliascogiovani.org/images/game-give-free-robux_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/freer-pro-tiktok_GM835599320.pdfIn PDF document text
    • http://grugliascogiovani.org/images/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://grugliascogiovani.org/images/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://grugliascogiovani.org/images/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://grugliascogiovani.org/images/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F5C 25288 bytes
SHA-256: 8255be1a1658d76311a6ee84cd843fcacaf8669ba24dc57db4a126d826c01a27
font_01_sfnt_off000088eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88EB 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off000092fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92FB 18868 bytes
SHA-256: 50c5a0018db69c0e0a21c6bd97de5d2a13af0498d31ad0f93d478355cffa66d1

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