Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee07a64fc0463031…

MALICIOUS

PDF

46.1 KB Created: 2021-06-11 09:12:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ddfa47716c101cf53cf8d4658b6abb53 SHA-1: 5d0564e8ea8ea2f7079963ec0636407d70c32670 SHA-256: ee07a64fc04630314b8e156d54392213df41a571b7383a76cfbc0d67f5c1c2e9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, specifically advertising 'free Robux' or 'game hacks' to lure users. The primary malicious URL identified is https://netcdn.tw/app/431946152/google-how-can-you-get-free-robux-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a social engineering attack designed to lead users to potentially malicious content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/google-how-can-you-get-free-robux-game-hack In PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-cards_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/robux-come_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/wwwcoin-master-free-spincom_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-hack-without-verification-or-downloading-apps_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-free-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-hack-https-coinms-net_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-hack-btools-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-team-panda_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-ability-spam-dq-hacks_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-jailbreak-hack-client_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-heaven-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/freespinandcoin-blogspot-com_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/minecraft-bedrock-edition-hacks_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-mods-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/como-hackear-coin-master-2021-espaol_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_off000052fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52FD 26100 bytes
SHA-256: 7b3fc4feb065832fde0c264224c217d5b66abadc2be1e91d92d4869fcb11cff5
font_01_sfnt_off00008f35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F35 19032 bytes
SHA-256: a3b9430c4d9e21eaa58286ab4cd01ddbdfdb766e831d11228bd779cd8b040321

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