Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f8f5b87ff6718ae…

MALICIOUS

PDF

35.2 KB Created: 2021-06-25 20:35:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c48b0fbd9fc8270d8980df7eb6244b63 SHA-1: 30e121b87fc2fa6c05651c68081a7a97428efcff SHA-256: 6f8f5b87ff6718ae31ce7da2b5a45e4142b31fa6c2492524620fee571f961e22
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, masquerading as game hacks or generators. The presence of a visual download button and the ML classifier's high confidence score further support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lure users to malicious sites, likely for credential harvesting or further malware delivery.

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-free-objet-game-hack In PDF document text
    • https://pustaka.mic.sch.id//repository/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/robux-page_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/roblox-dbz-legendary-powers-hack-script_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-mod-version-free-download-v344_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-attack-hack_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/free-roblox-cookie-logger_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/free-roblox-account-rich-ro-ghoul_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/robux-sans-hack_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-official-page_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/roblox-ghost-hack-download_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-heaven-daily-free-spins-and-coins-links_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/roblox-sex-cheat-code_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/free-robux-working-no-human-verification_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/how-many-levels-does-coin-master-have_GM406889139.pdfIn PDF document text
    • https://pustaka.mic.sch.id/repository/free-robux-viseo-not-clickbait_GM431946152.pdfIn PDF document text
    • https://pustaka.mic.sch.id//repository/coin-master-hack-quora_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_off00003239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3239 22696 bytes
SHA-256: bc25d82fab30508c7e3f55b7e1a90d376cfb02e2581214065f03599f1109fe1e
font_01_sfnt_off000064fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64FA 18944 bytes
SHA-256: b3ba9cddadfa9dcef2f006dc6d8e5e72a939a24adade22ab9a38930c52639710

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