Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b073e15bdbc50db…

MALICIOUS

PDF

35.1 KB Created: 2021-07-05 15:24:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8db5987466e56739a690fc72a3c39eda SHA-1: 8fcef8673245d1874b079aee72c3bb7a8f0378c7 SHA-256: 6b073e15bdbc50db5d9f560618aca085e222774ba1a672a0e71c53c9722bfd9e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains an embedded URL pointing to a site offering a 'coin-master-download-hack-ios-game-hack'. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and a call-to-action phrase further supports a malicious intent. The document likely serves as a lure to download a malicious application or exploit.

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.tw/app/406889139/coin-master-download-hack-ios-game-hack In PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/free-robux-codes-online_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/roblox-cheats-for-tix_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/easy-roblox-today_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/roblox-hacks-com_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/roblox-robux-hack-2021-pc_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/how-to-download-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/coin-master-hack-apk-no-survey_GM406889139.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/free-coins-2021-coin-master-link_GM406889139.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/hack-for-robux-with-edit-this-cookie-2021_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.widyagamahusada.ac.id/repository/free-minecraft-skins_GM479516143.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_off00003156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3156 23112 bytes
SHA-256: d803a2f94cc09dd653590b1de64081e080ceecee304d0b40b33e80d1dfe3c819
font_01_sfnt_off00006587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6587 18584 bytes
SHA-256: 0cc53e6ff5965a6bde6e826f187bf2e09f3f61dfd66a91e989fd5a35dba691c6

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