Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccf00b30b761a6ed…

MALICIOUS

PDF

44.9 KB Created: 2021-05-11 02:33:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 651b26aced0da387d0ce6d7e4bf7c49c SHA-1: ad0c310b0d6dcf54ba736cf561335f650f2f8cfd SHA-256: ccf00b30b761a6ed7eacd5669187518dfe601c3998b8ea3dd7ea28d6c0aa1d85
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links designed to lure users into clicking on what appears to be a 'free generator' or 'game hack'. These links redirect to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to drive users to a malicious website, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/431946152/free-premium-roblox-game-hack In PDF document text
    • https://www.tiancom.com.tw/upload/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-spin-link-2021_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-master-daily-free-rewards_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-robux-website_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/op-rewards-robux_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/play-coin-master_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/minecraft-modded-client_GM479516143.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/coin-spin_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/roblox-april-fools-hack_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/today-free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/roblox-free-item-codes_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/body-roblox_GM431946152.pdfIn PDF document text
    • https://www.tiancom.com.tw/upload/files/how-to-get-java-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004846.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4846 25296 bytes
SHA-256: e3dfea1fad486d879502acfcb67e69d92521ab74aa988e51bca7d2b006b1840f
font_01_sfnt_off0000827d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x827D 2828 bytes
SHA-256: db1860fd79a3f2cbe32e2bada3ba4c68a2d581b7a24294387cd777233cc9cef6
font_02_sfnt_off00008c34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C34 18620 bytes
SHA-256: db698e20de7c3d454232d28484b91ac7eeacd2d96f4c59a267e05c3027dbd208

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