Malicious PDF — malware analysis report

Static analysis result for SHA-256 53ed8afcbf6433d8…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 02:24:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 22b02d788bc7bc3d67fb6b9bf2430eaf SHA-1: 4504074b32a588fa3066ed9122d3514a186b5a51 SHA-256: 53ed8afcbf6433d850fc92c0bb2da691bc5444e37c774a7bcab716df673f5c38
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a redirector URL, masquerading as a 'game hack' or 'free spins' generator. The primary lure is the URL http://netcdn.tw/app/406889139/coin-master-free-spins-link-download-for-iphone-game-hack, which is flagged as malicious. The document body and embedded URLs reinforce this theme, suggesting a phishing or scam attempt to trick users into visiting malicious 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-spins-link-download-for-iphone-game-hack In PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/how-to-get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/free-sparkle-wings-roblox_GM431946152.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/minecraft-free_GM479516143.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/coin-master-free-spins-link-deutsch-ios_GM406889139.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/coin-master-promo-code-2021_GM406889139.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/be-a-parkour-ninja-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/coin-master-gold-cards-free_GM406889139.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/op-rewards-robux_GM431946152.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/coin-master-free-redeem-code_GM406889139.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/how-do-you-hack-through-walls-in-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://web.smkn1indramayu.sch.id/e-lib/repository/flame-gg-free-robux_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_off0000318b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x318B 22116 bytes
SHA-256: a7f210a5a37f64b9a4136861ae5863d7e0bb91a2589a435e153f82a88409edab
font_01_sfnt_off0000629d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x629D 19092 bytes
SHA-256: 9967cf0e9c6db6e1e986cee58115a2f3408cca5b408b847dc9d0581882ddd1ca

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