Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cb9b610c10ddaab…

MALICIOUS

PDF

34.3 KB Created: 2021-07-03 22:11:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3900b5f3ab9e69e548e9028397dea83e SHA-1: 55ca47e58d86b8bf0c9d712c6179faa30360ec01 SHA-256: 9cb9b610c10ddaab5c1b0f299f1a9388bb8d8b90cf0901ea553bf6e33b1ee234
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that redirect to game hack generators, a common lure for malware distribution. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the presence of numerous related URLs strongly indicate a malicious intent to trick users into downloading potentially harmful files. The document body itself contains obfuscated text and URLs, further supporting this malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/406889139/app-master-game-hack PDF link annotation
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/coin-monster_GM406889139.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/coin-master-hack-apk-facebook-login_GM406889139.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/free-robux-generator-no-survey-or-email_GM431946152.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/how-to-make-a-group-for-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/how-to-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/will-minecraft-ever-be-free_GM479516143.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/couleur-de-peau-free-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/how-to-get-a-free-dominus-in-roblox_GM431946152.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/how-to-get-hacks-on-minecraft_GM479516143.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/play-games-for-robux_GM431946152.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/how-to-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/coin-master-ios-hack-download_GM406889139.pdfIn PDF document text
    • http://elearning.man1kotamobagu.sch.id/__statics/gudangsoal/files/300-free-spins-coin-master_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
stream_002_off0000318c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x318C 22880 bytes
SHA-256: 06f47f5a3643afd69959e30c01502461311bdb0e5f46f6f2f7f5a2986b0fb09c
font_01_sfnt_off000064e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E8 17748 bytes
SHA-256: 7f35764ca496769aa6fdbaf6c3111c97d2ec009e45c432c622fda67b674d07f4

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