Malicious PDF — malware analysis report

Static analysis result for SHA-256 b27e32d4f97f41a5…

MALICIOUS

PDF

44.0 KB Created: 2021-06-08 20:30:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 69f22257a00a2b1d1e543150008ccd8f SHA-1: 2d93a9c0433ee9260208ff91d2f656ddfb3f3038 SHA-256: b27e32d4f97f41a5ad9a6cfc06b271cc0bdfbd886f824adf1495c65efd30df38
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as game hacks and free currency generators. These links, such as 'https://netcdn.tw/app/431946152/roblox-cs-go-hack-nasl-yaplr-game-hack', are designed to lure users into clicking them, likely leading to further malicious sites or phishing attempts. The ML classifier also strongly indicated maliciousness.

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/roblox-cs-go-hack-nasl-yaplr-game-hack In PDF document text
    • http://repository.unla.ac.id/repository/can-you-really-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/hacked-roblox-accounts-list_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/robux-hack-me_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-unlimited-coin-master-400-spin-link_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hack-tool-v1-9-download_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-village-3_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-spins-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/gameoffice-net-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hack-apk-link_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-pet-snacks-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/is-pokemon-go-a-free-app_GM1094591345.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-moderators_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-group-free-robux_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
stream_004_off00004fb0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FB0 24564 bytes
SHA-256: 10643cc51fb7480f12347025553f6bb83f9f48463bfbeb3b85f62c52868ed032
font_01_sfnt_off00008875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8875 18520 bytes
SHA-256: b7b6e097f822f2974d653d68bd3a9a43457878bd2a2182b21242e70e66bb0606

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