Malicious PDF — malware analysis report

Static analysis result for SHA-256 e54e173ec005c9c9…

MALICIOUS

PDF

45.3 KB Created: 2021-06-07 05:43:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9f5c5e5711924c5e3a925cf98db72891 SHA-1: 91462443c856e974e5cfd3d9102bf6891388e5a0 SHA-256: e54e173ec005c9c9240bdc4312bb7485c310a8ea47ac1b59d5d565a79f19c0c0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links that redirect to malicious infrastructure, disguised as free generators or game hacks. The ML classifier also flagged this PDF as malicious. The primary lure appears to be related to game cheats and free items, aiming to trick users into visiting the malicious redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/free-online-photoshop-for-roblox-game-hack In PDF document text
    • https://www.fishboat.hr/files/totally-free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/robux-website_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/coin-master-hack-download-apk_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/coin-master-online-hack-2021_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/minecraft-that-you-can-play-for-free_GM479516143.pdfIn PDF document text
    • https://www.fishboat.hr/files/www-free-robux-com_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/link-for-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/hack-coin-master-without-root_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/robuxfree-con_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/coin-master-hack-online-generator_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/coin-master-hack-lost-world-2021_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/is-tiktok-free-to-download-on-iphone_GM835599320.pdfIn PDF document text
    • http://fishboat.hr/files/coin-master-daily-free-spins-25_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/2021-free-spins-on-coin-master_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
stream_004_off00004ffc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FFC 26124 bytes
SHA-256: 9b6a99a6b3a15eabab5fd130df4b47b11b92f41817be0333409ec17b07824244
font_01_sfnt_off00008d75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D75 18668 bytes
SHA-256: 503c7acb962b250257edfa2ab63267946509fb632b48fd9b754a57af5101a4b7

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