Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0677b6ab0dc1bf2…

MALICIOUS

PDF

32.8 KB Created: 2021-06-28 07:34:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5d1761c908cce87100c38636d3884afa SHA-1: 3426cf7a1c51f51babed04f3abfa6fe154f7c9b2 SHA-256: d0677b6ab0dc1bf2444348fc23bc4f2af99b9c9e5c5f3885520cdab8b421980c
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and text lures related to free Robux and game hacks, aiming to trick users into clicking. The primary link, http://netcdn.co/app/431946152/free-robux-codes-trackid-sp-006-game-hack, is identified as a malicious redirector. This suggests the document is designed to lead users to potentially harmful websites, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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.co/app/431946152/free-robux-codes-trackid-sp-006-game-hack In PDF document text
    • https://3qblocks.com.tw/image/data/files/free-tiktok-accounts-and-passwords_GM835599320.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-robloxbloob_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-earn-robux-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-hack-ios-10_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-free-coins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/roblox-getting-hacked_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/hack-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/roblox-groups-that-give-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/how-to-create-a-shirt-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/what-is-coin-master-app_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/coin-master-free-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • https://3qblocks.com.tw/image/data/files/free-roblox-cards-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
font_00_sfnt_off00002a36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A36 21484 bytes
SHA-256: 703b25d26b4f602eb5b4c0a241c30ff536b4ddadc15ada451cfedd33bc46b38e
font_01_sfnt_off00005934.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5934 19728 bytes
SHA-256: 8adc7cf5e45a95ff75a1d57159396d22733e6349b80ab56fd6a697e99b5db6bc

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