Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6d73798b71fd623…

MALICIOUS

PDF

35.5 KB Created: 2021-07-05 03:16:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: a8d1d6f1958894a366c9c312bd3350ce SHA-1: 56021e8241980ceb08de15965874913e595fc081 SHA-256: d6d73798b71fd623e87f5c8ffc08d8174de08325bf17ae99ab6e3caa9cc62f14
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on a "game hack" or "free generator" which redirects to malicious infrastructure. The primary malicious URL identified is http://netcdn.tw/app/431946152/how-to-get-real-robux-game-hack. While no scripts were extracted, the document's structure and embedded URLs strongly indicate a phishing or scam attempt, likely delivered as a spearphishing attachment.

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-to-get-real-robux-game-hack In PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/free-cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/how-to-create-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/how-to-hack-coin-master-using-es-filer_GM406889139.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-group_GM406889139.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/smart-lodhi-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/easy-way-to-get-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/games-for-robux_GM431946152.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/how-to-download-minecraft-windows-10-edition-for-free_GM479516143.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/free-robux-hack-online_GM431946152.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/script-hack-roblox-ro-ghoul_GM431946152.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://elearning.mialhidayahkotamadiun.sch.id/__statics/gudangsoal/files/hack-coin-master-2021_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_off00003337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3337 22632 bytes
SHA-256: 023148ae5580b70e018fb4718178ae9123803f12a5be687f9bcfc31a27ba7df5
font_01_sfnt_off000065fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65FC 18896 bytes
SHA-256: e8f2e0d2ba449877798c94f28befa8d5926087633ca73b8134ed7ad246db287c

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