Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ad8a3b622aff9a5…

MALICIOUS

PDF

49.2 KB Created: 2021-06-07 09:07:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ecd187956b5d0812f3133a05091d0587 SHA-1: 7abba91070abc6a67914abb491385ba1788b1abf SHA-256: 7ad8a3b622aff9a55c1528f4c4d6f309a0ea5bca1eecb7cca51591110e2dd9ec
160 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the presence of malicious redirector links and the lure suggest an attempt to lead the user to a site that likely hosts further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/roblox-exploit-2021-cheat-engine-game-hack In PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/freerubux_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/coin-master-gold-cards-free-2021_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/spin-and-coin_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/minecraft-com-free_GM479516143.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/minecraft-pe-hacks-ios_GM479516143.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-spins-on-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-free-robux_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/buxblast-com-robux_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/coin-master-free-daily-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/coin-master-free-spin-2912-2021_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/coin-master-map_GM406889139.pdfIn PDF document text
    • https://repository.poltekkesgorontalo.ac.id/repository/coin-master-free-spins-and-coins-haktuts_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5145 27320 bytes
SHA-256: 5b9e68b3b0fab7c84d414d7984b558d97b1243a3f043d8a139f4a5eccbee7f80
font_01_sfnt_off00009071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9071 2940 bytes
SHA-256: eb230542719c96b42e3fd8bb01e35f13ebd5f02629049da3a58e7fd7607bf48a
font_02_sfnt_off00009a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A80 19268 bytes
SHA-256: 4efe1781c9c5eab71f49b1e6ae008c3b307e93e7e8c32a098e6200c85370fa61

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