Malicious PDF — malware analysis report

Static analysis result for SHA-256 289b73b545fa2473…

MALICIOUS

PDF

42.6 KB Created: 2021-05-15 07:17:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: bea1d351a32e9471f65d9a9683c14e6a SHA-1: 17e1e9b9d5f1549fadbc87bec463a1aae4cd88ec SHA-256: 289b73b545fa24734879a65d1e1fd14eb7886b85ec0037e3e48133e0f227009b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, specifically advertising 'Coin Master' game hacks and free spins. The document body and embedded URLs reinforce this lure, aiming to trick users into visiting the malicious site. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/406889139/coin-master-free-spin-no-offers-game-hack In PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/haktuts-coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/coin-master-attack-madness-hack_GM406889139.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/roblox-earn_GM431946152.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/hack-para-coin-master-sin-verification_GM406889139.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/latest-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/daily-free-spins-coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/toolbox-mod_GM479516143.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/coinmaster-twitter_GM406889139.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/free-spins-in-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/coin-master-free-2021-spin-link-today_GM406889139.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/coin-master-400-spin-link-today_GM406889139.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/coin-master-daily-free-spin-app_GM406889139.pdfIn PDF document text
    • http://assets.dpt.go.th/dptda/ckfinder/userfiles/files/buxblast-com-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
stream_003_off00004750.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4750 26992 bytes
SHA-256: 9243d65f08a1e1d34eeca7cb2aadb8c531376c59b6c8782bbc6813ff681ddbfa
font_01_sfnt_off0000858a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x858A 17884 bytes
SHA-256: eca834da90127d06b30cbbdb6bc39378e5aaec836d7f1468a5bfe601ae733219

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