Malicious PDF — malware analysis report

Static analysis result for SHA-256 286f9d3982714d33…

MALICIOUS

PDF

32.9 KB Created: 2021-07-03 19:30:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 58fb418040db2daeb27a0823e1f59da4 SHA-1: 87e4c66aaf3032a51c18cacd340755af5091703a SHA-256: 286f9d3982714d337a3b8a890f314d2b36623f030ccc0e47bb4c12609e72c8b5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links to a known malicious redirector, specifically advertising 'free generator / game hack' lures for popular games like Coin Master and Roblox. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves tricking users into clicking these links, likely leading to further malware downloads or phishing pages.

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-heaven-game-hack In PDF document text
    • http://library.yamasi.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/get-more-robux_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/robux-generator-hack-2021-apk_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/how-to-hack-roblox-accounts-youtube_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/lucky-patcher-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-robux-net_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/hack-strucid-roblox-aimbot_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/how-to-get-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/roblox-speed-hack-2021-download_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/free-jailbreak-private-server-roblox_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/200-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id/repository/one-app-rewards-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-links-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://library.yamasi.ac.id//repository/coin-master-hack-apk-2021_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_002_off00002dea.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2DEA 22016 bytes
SHA-256: 8bf79ba6b41cfd227e0f5495772a74099fda2d370e0bf034940e14b95b650014
font_01_sfnt_off00005eb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB3 17948 bytes
SHA-256: 2b0b7ff6293efa0103c8c2231913429400a11b3f6a70388b902ae1f868ebf0a4

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