Malicious PDF — malware analysis report

Static analysis result for SHA-256 61a9efd466bc0a63…

MALICIOUS

PDF

44.7 KB Created: 2021-06-11 07:11:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: fbc80380338763ad2d962ee75e3802d2 SHA-1: 46fc2ab7b69657fae1c971c78c3190a0ab4c55d6 SHA-256: 61a9efd466bc0a63cdedb4d4332f6554c7c28e4ef735fbfb94dc2d841f7f8980
160 Risk Score

Malware Insights

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

The PDF contains a link disguised as a game hack generator, which is a common lure for phishing or malware distribution. The link redirects to a known malicious domain, indicating a likely attempt to download a second-stage payload or redirect the user to a phishing site. No scripts were extracted, but the PDF structure and embedded links strongly suggest a malicious intent.

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/hack-a-game-in-roblox-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/blogspot-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-hax-download-no-virus_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-free-robux-easy-no-download_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/real-working-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-spins-link-cheat_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/unlimited-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-free-demo_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/pokemon-go-hack-version-free-download_GM1094591345.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-apocalypse-rising-hack-exploit_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/roblox-arsenal-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/archery-master-3d-coins-hack_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
stream_004_off00005138.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5138 25532 bytes
SHA-256: d4304066e029706c45d5e2a08bc5ade49f2f3f3643acbc26ec10833d5426d309
font_01_sfnt_off00008b66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B66 18440 bytes
SHA-256: 63ed9ba10786afc9e67f028448b875c392a23e885ea699b450d93eaeff693960

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