Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bcb34eabab220a1…

MALICIOUS

PDF

46.5 KB Created: 2021-06-04 04:50:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 18b8cbd5f028d46256f0c30a10d7f968 SHA-1: d8fab7dc17b83f2b3d74f133fde8f4413753f7bc SHA-256: 9bcb34eabab220a192b70d1dbc0b518b2ddc250edc2f4b194f3c50a11e1a75f0
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 0.9832

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.online/app/406889139/static-moonactive-net-free-spins-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.online/app/406889139/static-moonactive-net-free-spins-game-hack PDF link annotation
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-free-pet-food-links_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-get-more-robux_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-robux-no-downloading-apps_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/i-need-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/how-to-hack-coin-master-apkmody_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/minecraft-tools_GM479516143.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-free-spins-link-download-hack_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/minecraft-xbox-one-edition-digital-code-free_GM479516143.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/free-robux-project-gamesnet_GM431946152.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/tiktok-free-view-iphone-6s_GM835599320.pdfIn PDF document text
    • http://opac.disarpus.surakarta.go.id/repository/coin-master-free-cards-link-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
stream_004_off00005235.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5235 29632 bytes
SHA-256: b4f41a4ce90bcf9f10a99e94d82a2c5d92dfc27d4376fe4bebfcf2e29c5720af
font_01_sfnt_off00009449.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9449 18000 bytes
SHA-256: 550c58a86183c192f11bd993c378cabcbb9cb434b0a2a3ed80188f155553ce19

Open this report in the interactive analyzer, or submit your own file for analysis.