Malicious PDF — malware analysis report

Static analysis result for SHA-256 17e157d4c0e1a33d…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 08:44:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c4f7c8ebf088870bfa1a4ec177724ad6 SHA-1: ab154c183b7f2094717dc5c9659962b7debb160f SHA-256: 17e157d4c0e1a33dd2c17bcd7914972c46ab2bda623c80e534c4ed8c001b6082
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free coin master spins' and other game-related hacks. The document body and heuristics confirm the lure is for game cheats, which is a common pretext for phishing or malware delivery. The primary IOC is the malicious redirector URL, which likely leads to a further stage of the 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/free-coin-master-spins-for-today-game-hack In PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/coin-master-hacks-for-spins_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/roblox-prison-life-20-hack-download_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/minecraft-pocket-edition-apk-free-download_GM479516143.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-robux-hack-download-free_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/roblox-adopt-me-cheats_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/how-to-get-a-free-valk-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/hackear-roblox-apk_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/google-only-avatar-free-roblox_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-robux-without-verify-2021_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/how-to-change-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/minecraft-free-version_GM479516143.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/nombre-hacker-roblox_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/getrobux-now_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/free-cool-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustakasma.nurulfikri.sch.id/repository/how-to-cheat-in-roblox-guess-that-song_GM431946152.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_off000030eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30EB 22960 bytes
SHA-256: 7ead0bf2206fd59b656404ff2e56b5793367016e7d9aa22d1a4486413c054807
font_01_sfnt_off00006460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6460 18528 bytes
SHA-256: 7516c489b1b881653228620cc2b0dc971f4c0cc04e000053424a555de8493b8f

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