Malicious PDF — malware analysis report

Static analysis result for SHA-256 81d6f0d0ca16a2c6…

MALICIOUS

PDF

35.2 KB Created: 2021-06-18 16:15:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5098e91f0cde8baa3ac3799d6b5a264c SHA-1: 8d26406365323d7410d4d6baa9ead8432b0c165f SHA-256: 81d6f0d0ca16a2c6ce0c0424a3f2e7b9093b1bca7290247fe6cc52c99972d993
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure related to game hacks and redirects to a known malicious URL. The ML classifier also flagged this PDF as malicious. The presence of embedded URLs and the lure suggest an attempt to trick the user into visiting a malicious site, likely to download further malware or engage in phishing.

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/como-hackear-roblox-game-hack In PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/is-minecraft-free-on-mac_GM479516143.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/how-to-hack-on-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/free-spin-coin_GM406889139.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/pubg-uc-online-free_GM1330123889.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/robux-free-online_GM431946152.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/change-roblox-username-free_GM431946152.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/roblox-cheat-engine-62-noclip_GM431946152.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/minecraft-java-free_GM479516143.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/how-to-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/free-tiktok-followers_GM835599320.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/free-400-spins-coins-master_GM406889139.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/free-minecraft-skin-maker_GM479516143.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/wurst-client-download_GM479516143.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/robux-free-com_GM431946152.pdfIn PDF document text
    • https://mts.almuhtaduun.com/__statics/gudangsoal/files/coin-master-free-coins-links-2021_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_off00003298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3298 22520 bytes
SHA-256: fda50a05990b80b9149088c272fac8f1abbbb537df938318d2940c49835b4b79
font_01_sfnt_off000064dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64DD 18916 bytes
SHA-256: f47b009e93c0412e4aa2db9900e48a98c0c093575f5ba54008dbc937ab94ba33

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