Malicious PDF — malware analysis report

Static analysis result for SHA-256 71b487542c1ead24…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 06:07:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: de7cc831fd9827c36f7189aa2916a192 SHA-1: 2461cc8d9d201b936108e87ac196577fb6bae0ff SHA-256: 71b487542c1ead2419dbc9b99590a5d72e026c3873bfee8d89859903819a13d1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of free game currency and hacks to entice users. It contains multiple embedded URLs, with a primary redirector at http://netcdn.tw/app/406889139/coins-master-hack-game-hack, which is flagged as malicious. The document's structure and embedded links suggest it is designed to lead users to potentially harmful websites, likely for further exploitation or malware delivery.

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/coins-master-hack-game-hack In PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/how-to-make-the-animation-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/fahrzeug-simulator-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/open-coin-master_GM406889139.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/free-robux-every-day_GM431946152.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/impact-hack-roblox-download_GM431946152.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/coin-master-daily-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/coin-master-hack-game-download_GM406889139.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/how-to-get-free-robux-com_GM431946152.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/get-free-roblox-robux-on-therobuxapp-com_GM431946152.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/how-many-villages-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/how-to-get-free-robux-without-hacking-2021_GM431946152.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/coin-master-spin-link-free_GM406889139.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/com-roblox_GM431946152.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/roblox-generator-no-verification_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_off00003220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3220 23268 bytes
SHA-256: c6635a2372fc60c96ee3c2e492138337a1f23e6bb8194c9fd3678d674ac319e6
font_01_sfnt_off00006690.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6690 18004 bytes
SHA-256: 0f5586fad8963a3d66dcc08ea216a344d94ecc2f9eb49a7a48818ccd749a571f

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