Malicious PDF — malware analysis report

Static analysis result for SHA-256 82c44625d156b62c…

MALICIOUS

PDF

33.9 KB Created: 2021-07-05 09:12:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 811af5ccf1f8a156f18904d75be984e5 SHA-1: be8c57118463b18ca082fbee9b997cb654594f99 SHA-256: 82c44625d156b62c88c93a9e633b8429d9e846d22f0b1a41f433fd010e39bf46
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains multiple embedded URLs and a prominent call-to-action related to "hacks" for popular games like Coin Master and Roblox. The ML classifier strongly flagged this PDF as malicious, indicating it likely leads to a malicious download or phishing attempt. While no scripts were extracted, the presence of these lures and the high ML score suggest a social engineering attack.

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/online-coin-master-hack-here-game-hack In PDF document text
    • http://library.unissula.ac.id/fk/repository/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-stuff-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-hack-roblox-no-download_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/how-to-earn-free-stars-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-btools-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/2021-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/hack-roblox-commands_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/murder-mystorys-roblox-knife-hack_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-card-hack_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/daily-free-coin-and-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/roblox-free-executor_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-com-r_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/cheat-engine-for-roblox-mac_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-cheat-robux-generator_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-online-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-hack-2021-download_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-coin-master-hacks-no-verification_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
font_00_sfnt_off00002fef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FEF 22600 bytes
SHA-256: 57a92a0ff008ff386fcdf88a7bbfbe47fa0ac66f8cd103bd3cc1f5d5a06ec431
font_01_sfnt_off00006285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6285 18080 bytes
SHA-256: 9b8e948b254d81f42744a3713bd5e57e94ce20b378f0589ec816b2d02d355b2b

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