Malicious PDF — malware analysis report

Static analysis result for SHA-256 98495b0d4408f44a…

MALICIOUS

PDF

44.9 KB Created: 2021-06-10 13:57:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3370bbbe6faae2c4f6d8f8cc7d20d09e SHA-1: 5c33a27ca9df9d2c8bc2a16b932610defbfafb82 SHA-256: 98495b0d4408f44af4cd342352bdea806c28815a16a489bba7e06efe6aba5325
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to a malicious domain, masquerading as game hacks or generators. The ML classifier also flagged this PDF as malicious. The embedded links and the lure content strongly suggest a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/adopt-me-roblox-hacked-game-hack In PDF document text
    • http://library.thamrin.ac.id/repository/free-spin-hack-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-robux-only-username_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/static-moonactive-net-link_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/daily-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-robux-reddit_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-hack-online-2021_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/how-to-get-free-cute-clothes-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/roblox-slient-aim-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/roblox-pc-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-hack-apk-35-18_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/coin-master-hack-apk-ios-download_GM406889139.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://library.thamrin.ac.id/repository/robux-hack-apk-2021_GM431946152.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_off00004efe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4EFE 27380 bytes
SHA-256: 10963a5cde75e633895b2fbfaa8c259aab843b08f0b1ee459fb4610e6f68b8ef
font_01_sfnt_off00008b46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B46 18832 bytes
SHA-256: f3e55ec6a9c11d1f135c9423312e9a321052bfb474f1ee71c596a43fa9de8333

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