Malicious PDF — malware analysis report

Static analysis result for SHA-256 9db698dc69480006…

MALICIOUS

PDF

42.6 KB Created: 2021-05-12 11:14:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: e4a77f21c906d93c0f32faca6d8d7c91 SHA-1: 797f02389b8de3f8bc4c96876ecbf280e8ba708f SHA-256: 9db698dc69480006ca46c5430ab1f92eb6d27fbea6538b3dfd1629e80fecca1a
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/free-robux-game-hack.
  • 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 https://netcdn.xyz/app/431946152/free-robux-game-hack PDF link annotation
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/coin-master-free-spins-hacktman_GM406889139.pdfIn PDF document text
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/roblox-hack-site_GM431946152.pdfIn PDF document text
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/roblox-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/minecraft-noob-vs-pro-vs-hacker_GM479516143.pdfIn PDF document text
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/free-download-coin-master_GM406889139.pdfIn PDF document text
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/coin-master-collect-today-free-spin_GM406889139.pdfIn PDF document text
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/make-free-robux_GM431946152.pdfIn PDF document text
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/free-avatar-roblox_GM431946152.pdfIn PDF document text
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/coin-master-daily-gifts_GM406889139.pdfIn PDF document text
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/lots-of-robux_GM431946152.pdfIn PDF document text
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/coin-master-spin-hack-link_GM406889139.pdfIn PDF document text
    • https://elearningmas.alhidayahwanti.sch.id/__statics/gudangsoal/files/coin-master-free-gold-cards-link-2021ee-spins_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_003_off00004c41.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C41 25236 bytes
SHA-256: 491c994d0eb82635bcb04073f2dfc794b73023f1c56b2e9096965d30fde21afa
font_01_sfnt_off00008501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8501 18012 bytes
SHA-256: 3ef9e48aa3d97d4217e004f7625a8cbae9320a74231b80a01553f6433e422360

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