Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8ae3c52e7ae03ec…

MALICIOUS

PDF

35.0 KB Created: 2021-07-09 00:52:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e547956e7e1f8023eb3682c69b2480ef SHA-1: 679c671d89bcf6dfd2f4ef31c18a8d75d245aaf5 SHA-256: e8ae3c52e7ae03ecfc628daadba11455b5f43168469abab6e6f24bdc5594cdc2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs that lure users with promises of game hacks and free accounts, specifically mentioning Roblox and Discord. The primary malicious URL identified is http://netcdn.tw/app/431946152/discord-free-account-roblox-game-hack, which likely leads to a phishing or malware download page. Although no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack, 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 high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/discord-free-account-roblox-game-hack PDF link annotation
    • http://elearning.min11blitar.sch.id/__statics/gudangsoal/files/how-to-hack-into-a-roblox-account-on-ipad_GM431946152.pdfIn PDF document text
    • http://elearning.min11blitar.sch.id/__statics/gudangsoal/files/how-to-get-free-roblox-clothes-without-builders-club_GM431946152.pdfIn PDF document text
    • http://elearning.min11blitar.sch.id/__statics/gudangsoal/files/free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.min11blitar.sch.id/__statics/gudangsoal/files/kid-caught-cheating-on-his-roblox-gf_GM431946152.pdfIn PDF document text
    • http://elearning.min11blitar.sch.id/__statics/gudangsoal/files/free-roblox-accounts-dantdm_GM431946152.pdfIn PDF document text
    • http://elearning.min11blitar.sch.id/__statics/gudangsoal/files/coin-master-ios-hack-download_GM406889139.pdfIn PDF document text
    • http://elearning.min11blitar.sch.id/__statics/gudangsoal/files/coin-master-apk-mod-hack-download_GM406889139.pdfIn PDF document text
    • http://elearning.min11blitar.sch.id/__statics/gudangsoal/files/roblox-jailbreak-how-to-get-unlimited-free-jailbreak-money_GM431946152.pdfIn PDF document text
    • http://elearning.min11blitar.sch.id/__statics/gudangsoal/files/coin-master-free-spins-today-39_GM406889139.pdfIn PDF document text
    • http://elearning.min11blitar.sch.id/__statics/gudangsoal/files/free-robux-codes_GM431946152.pdfIn PDF document text
    • http://elearning.min11blitar.sch.id/__statics/gudangsoal/files/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://elearning.min11blitar.sch.id/__statics/gudangsoal/files/roblox-free-summer-codes_GM431946152.pdfIn PDF document text
    • http://elearning.min11blitar.sch.id/__statics/gudangsoal/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.min11blitar.sch.id/__statics/gudangsoal/files/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://elearning.min11blitar.sch.id/__statics/gudangsoal/files/how-to-make-a-free-robux-game_GM431946152.pdfIn PDF document text
    • http://elearning.min11blitar.sch.id/__statics/gudangsoal/files/coin-master-game-free-download-for-pc_GM406889139.pdfIn PDF document text
    • http://elearning.min11blitar.sch.id/__statics/gudangsoal/files/coin-master-hack-1021_GM406889139.pdfIn PDF document text
    • http://elearning.min11blitar.sch.id/__statics/gudangsoal/files/roblox-birthday-invitations-free-printable_GM431946152.pdfIn PDF document text
    • http://elearning.min11blitar.sch.id/__statics/gudangsoal/files/roblox-2021-unused-giftcards-for-free_GM431946152.pdfIn PDF document text
    • http://elearning.min11blitar.sch.id/__statics/gudangsoal/files/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.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_off0000321b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x321B 22064 bytes
SHA-256: 63491193dfc076c6a35742fa1c1dd07d71e5098dc60f9bdee5e668b69ef1ce5f
font_01_sfnt_off000062fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62FC 19356 bytes
SHA-256: 9952513df36009b570bad21de627f705f4ed6535e5035acd974bf933e8237397

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