Malicious PDF — malware analysis report

Static analysis result for SHA-256 249158d4cfa808bb…

MALICIOUS

PDF

33.6 KB Created: 2021-07-05 23:04:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: d4cf9980f825e00fabb1b351c2b9c2f4 SHA-1: ac16c51ea2e084fac24fc3bc842561d7623bf886 SHA-256: 249158d4cfa808bb647d3494dcfd9c49479c6da57b51a29ca61bc2bba3f6cf53
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and game hack lures, indicating a phishing or malware distribution attempt. The document body explicitly mentions 'Coin Master Free Spin Today' and 'CLICK HERE TO ACCESS COIN MASTER GENERATOR', reinforcing the lure. The presence of numerous embedded URLs suggests a broad campaign to redirect users to potentially harmful sites.

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-free-spin-today-game-hack In PDF document text
    • http://lib.unar.ac.id/repository/hack-avatar_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/roblox-ro-ghoul-hack-rc_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/i-need-robux_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/coin-master-attack-madness-hack_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/hacks-roblox-my-hero-academia-2021_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/how-to-have-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/hackear-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id//repository/free-robux-not-fake_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/roblox-music-gui-hack_GM431946152.pdfIn PDF document text
    • http://lib.unar.ac.id/repository/coin-master-free-spins-for-iphone_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_off00002e32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E32 22392 bytes
SHA-256: 3d57d1e8ba94e807c4f137a1396f93125e368a0061cd90d2fca0d57b5632ccbb
font_01_sfnt_off00005fd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD9 18528 bytes
SHA-256: 611292c7b78d9aef83f236a5f61e8588922333099173db31565d3b831f2ee55a

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