Malicious PDF — malware analysis report

Static analysis result for SHA-256 9da38c8a218ecb7f…

MALICIOUS

PDF

36.2 KB Created: 2021-07-05 23:25:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 690e8d969f4e8fccdea81e4c4461fffc SHA-1: fd765fab05052b28eb25286a5d92b6b374ced8c2 SHA-256: 9da38c8a218ecb7fc0717d2e09cacec122411fb4086f2a4af26a7db698a01795
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it links to malicious redirector infrastructure, specifically promoting 'free generator / game hack' lures. The embedded URL http://netcdn.tw/app/406889139/coin-master-hack-game-game-hack is identified as a malicious redirector. The document body also contains this URL, reinforcing the lure. Although no scripts were extracted, the PDF structure and embedded links strongly suggest a phishing or malware distribution attempt.

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-hack-game-game-hack In PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/descargar-roblox-hack-apk_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/roblox-aimbot-hack-v3rmillionm_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/how-to-get-free-plus-on-roblox-meepcity-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/como-hackear-a-un-usuario-de-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/how-to-get-minecraft-for-free-on-xbox-360_GM479516143.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/collect-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/how-to-get-roblox-for-free-no-download_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/20-free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/minecraft_GM479516143.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/roblox-free-group-finder_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/roblox-ad-maker-free_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/dgeler-rocach-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/hacks-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ditjenpkh.pertanian.go.id/pusvetma/repository/coin-master-daily-spins-and-coins_GM406889139.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_off00003625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3625 23440 bytes
SHA-256: 77b68ee145d78ef52baa53f6731cd9f8ce88c0a426b7d6ddfd84d30fab001eaa
font_01_sfnt_off00006b20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B20 18264 bytes
SHA-256: 2c73ebf7d2de528526554eae41b5dd46ec69da4f53548459fc1d852cab5602a0

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