Malicious PDF — malware analysis report

Static analysis result for SHA-256 d66664e6d8009867…

MALICIOUS

PDF

34.5 KB Created: 2021-07-05 09:23:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9c58eb44842fd76150d69662bf1b9e99 SHA-1: 9fe8ae8a1606e4ce3c06814b4432f190bbd7f1e7 SHA-256: d66664e6d80098670939fa52f872e1c8d3eabe0df4079d5d3b593dfc9b322f80
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The ML classifier strongly indicates maliciousness, supported by an embedded URI pointing to a suspicious download URL. The document body and numerous extracted URLs suggest a lure related to game cheats and currency, likely leading to a malware download. The presence of a visual download button heuristic further reinforces this malicious intent.

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/cm-daily-spins-game-hack In PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-roblox-hacker-com_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/robux-today_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-studio-free-download_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/game-toolbox_GM479516143.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-can-i-get-free-robux-super-easy_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-download-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/robux-hack-tutorial_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-drop-master-free_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/hacker-egg-roblox-2021_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/btools-hack-roblox-2021-not-rar_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-redeem-code-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/free-obc-roblox-2021_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/coin-master-gift-hack_GM406889139.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • https://morishita-tc.com.tw/image/data/files/how-to-use-cheat-engine-for-roblox-2021_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_002_off00003144.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3144 22592 bytes
SHA-256: 0ce0f372521c2d2755a6b8a4bbe9261fcdf68c1d929202ae47fd738c0a584ee7
font_01_sfnt_off000063f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F5 18444 bytes
SHA-256: 9310a5a671c6c896b8e6899ee968499b259e9e83afd9056ee0dbc4eed4bf4d40

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