Malicious PDF — malware analysis report

Static analysis result for SHA-256 24347c480706ee55…

MALICIOUS

PDF

33.5 KB Created: 2021-07-07 17:24:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b650ce3193a20e76cba78a897dfac962 SHA-1: 71c27132d869530316c8d397315b2e3b8ead1790 SHA-256: 24347c480706ee553a047944fe2729fca024fc93132bb5afde51db0ab357879f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a call-to-action phrase, strongly suggesting a phishing or social engineering attempt. The primary URL, http://netcdn.tw/app/431946152/blox-supply-free-robux-game-hack, is likely a lure to download a second-stage payload. The ML classifier also flagged this PDF as malicious with high confidence.

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/431946152/blox-supply-free-robux-game-hack In PDF document text
    • https://dolphintour.vn/images/uploadsfiles/711-roblox-hacker_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/coin-master-free-link-2021_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/robux-free-co_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/roblox-operation-scorpion-hack_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/free-robux-plsss_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/free-likes-for-tiktok_GM835599320.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/free-robux-images_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/cheat-engine-roblox-shut-down_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/roblox-apocalipse-rising-hack-dll_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/how-to-change-your-username-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/coin-master-hack-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/how-to-hack-a-minecraft-account_GM479516143.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/how-to-hack-minecraft_GM479516143.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/roblox-rape_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/robloxcom-download-free-pc_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/free-spins-for-coin-master-hack_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_off00002ea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EA8 21484 bytes
SHA-256: d4c8a4d6f34d0ef08ef245eb786abcf7ff53298abb0cec6f0d0d176d0f742c59
font_01_sfnt_off00005d91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D91 19144 bytes
SHA-256: c941b9cd330ffca6848f3389b5cbc1876b0a4e3bd2ae57faafcb8fbf1ae02fb5

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