Malicious PDF — malware analysis report

Static analysis result for SHA-256 04900e6dc01e9bc7…

MALICIOUS

PDF

35.2 KB Created: 2021-06-25 14:19:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8d63dc26053036c496a1438506d95128 SHA-1: 96d93afa94e91e11b29239720c9f08c933a47114 SHA-256: 04900e6dc01e9bc7ab20be0ee4d7d13894cd70529ab9cf2aef87d08d2aacbd71
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including a critical one pointing to a known malicious redirector infrastructure. The document body and heuristics indicate a lure for game hacks, specifically mentioning Roblox username changes, which is a common social engineering tactic to trick users into clicking malicious links. The ML classifier also strongly flagged this PDF as malicious.

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.co/app/431946152/how-to-change-roblox-username-for-free-game-hack In PDF document text
    • https://library.um-sorong.ac.id/repository/roblox-hack-character-skin_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/coin-master-hack-tool-without-verification_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/roblox-jason-mask-free_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/roblox-anti-hack_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/how-do-you-hack-for-2021000-coins-on-flip-master_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/how-to-get-free-robux-august-2021_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/rbx-tools-free-robux_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/flip-master-free-coins_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/coin-master-heaven-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/pajamas-roblox-free-shipping_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/how-to-cheat-health-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/coin-master-free-spins-twitter_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/minecraft-download-free-download_GM479516143.pdfIn PDF document text
    • https://library.um-sorong.ac.id/repository/coin-master-hack-no-download_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_off00003215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3215 22532 bytes
SHA-256: aea1bca822ded94a8fd6f9710611aa3277f70f042e4d7aba89a7f0f30aafc532
font_01_sfnt_off00006431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6431 19240 bytes
SHA-256: f3cfe40ff9bd13452b535b9c372db0919eaf0c35b929878a2988ec76d4edfb2d

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