Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6f83357a250e272…

MALICIOUS

PDF

32.3 KB Created: 2021-06-28 00:29:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e573f4c92d318938d184abd0df9c98f6 SHA-1: c80ec2755861a341a037b1b4f8e1623ddb967e19 SHA-256: f6f83357a250e2725828a7e8598300a4380aaa6b5060b0f580d5c7ee6a4daf69
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to known malicious infrastructure, specifically a site offering 'free robux game hack'. The document body text and heuristics confirm a lure for game-related cheats, which is a common social engineering tactic. The presence of embedded URLs and the nature of the lure strongly suggest a phishing or scam attempt designed to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/bux-gg-roblox-free-robux-game-hack In PDF document text
    • https://library.uigm.ac.id/repository/robux-now_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-free-spin-today-2021_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/hack-roblox-robux-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/wij-indigo-ii-free-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/best-free-minecraft-servers_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/100-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/minecraft-pe-hacks-2021_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/hacking-laurenzside-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/cheat-rpg-world-roblox-script_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-free-robux-hack-code_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/hack-apk-download-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-robux-generator-free-download-no-surveys_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-fly-hack-lua-download_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-generator-for-xbox-one-no-verification_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/doctor-louie-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-spins-coin-master-links-app_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_off000029ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29EC 21832 bytes
SHA-256: 1ac4c138450b51a0927b6e11930a2726584a775d6291071c583cf3abcfab6a51
font_01_sfnt_off00005a41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A41 18788 bytes
SHA-256: 264bd9778338e6a17fe88c61a4da0da4032dfc5946b5734781fdb8ab2436ab44

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