Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab99cd88092fa9ec…

MALICIOUS

PDF

31.6 KB Created: 2021-05-16 00:34:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 298cb3f723fc5a892c89f3953b2c58a2 SHA-1: 09a49110e96fd6461155725aaa7f5da42cd3a7f7 SHA-256: ab99cd88092fa9ec21990210d6f366f8033344bf1d2c284a86545c141a7442bb
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external URLs, including one identified as a malicious redirector. The primary lure appears to be related to 'free spins' for a game, suggesting a scam or phishing attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 3

  • 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.
  • 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.xyz/app/406889139/collect-free-spins-coin-master-game-hack In PDF document text
    • http://lib.unwahas.ac.id/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/coin-master-free-spins-cheat-deutsch_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/coin-master-mod-apk-latest-version-free-download_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/what-games-give-you-robux_GM431946152.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/roblox-hack-ga_GM431946152.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/coin-master-spins-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/roblox-account-hacker-tool_GM431946152.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/how-to-win-attack-madness-in-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/coin-master-hack-org_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/free-private-minecraft-server_GM479516143.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://lib.unwahas.ac.id/repository/coin-master-spin-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049c7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49C7 24756 bytes
SHA-256: 9f74b1d450b931dd5e79410757a5bd9b1dc57dd50b09509a618beab86444bc12

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