Malicious PDF — malware analysis report

Static analysis result for SHA-256 738e3bd1f769b3dd…

MALICIOUS

PDF

35.0 KB Created: 2021-07-07 14:30:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1332de147e493e7cc85c768b251bd1c0 SHA-1: 9439a919fc9f5fad097e512070e6c869edca6d9f SHA-256: 738e3bd1f769b3dd4b81b28610701e146ad72189ffd8d5ee244590ee7df85d57
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to malicious infrastructure, specifically advertising 'free generators' and 'game hacks' for popular games. The primary lure URL is http://netcdn.tw/app/431946152/how-do-you-get-roblox-for-free-game-hack. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to direct users to potentially malicious websites, likely for credential harvesting or further malware delivery.

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/how-do-you-get-roblox-for-free-game-hack In PDF document text
    • https://alimi.com.tw/upload/files/coinmasterfreespinlink_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-items-roblox-script_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/roblox-card-pin-hack_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/how-to-hack-mcpe-master-coins_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/coin-master-heaven-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/coin-master-cards-free_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/roblox-cheats-to-get-2021-robux_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/how-to-get-robux-app-no-hack-or-cheat_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/bloxburg-roblox-free-download_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/coin-master-2021_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/coin-master-free-coins-and-spins-group_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/robux-hack-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/robux-infinity-free_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-robux-codes-site_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/how-to-get-a-lua-injector-for-hacking-roblox_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/comment-hacks-roblox-2021-download_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_off00003167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3167 22104 bytes
SHA-256: 3accd8559dc113685982982dd6fb58419b0109ed0b1bc135aef155dc8806140b
font_01_sfnt_off0000628e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x628E 19388 bytes
SHA-256: 0287b2efa86f82f9cff2286bd64445162d29d1d724c92a5799971612c145cba7

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