Malicious PDF — malware analysis report

Static analysis result for SHA-256 116b66aabb54c803…

MALICIOUS

PDF

42.6 KB Created: 2021-05-15 00:09:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7404e5029f2b42a4ef10b835cc4b2f49 SHA-1: aad4d010227823b8c70433213a67f7ab38377059 SHA-256: 116b66aabb54c803ddadff789f50d8d3a3a99d5b7853ea186da118298b23bd88
122 Risk Score

Malware Insights

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

The PDF document contains a lure for a 'free generator / game hack' and displays a fake CAPTCHA to trick users into interacting with the document. It links to external URLs, one of which is a known redirector for malicious content. The ML classifier strongly indicated maliciousness, and the overall pattern suggests a phishing or scam attempt designed to lead the user to a malicious site or download.

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/no-robux-game-hack PDF link annotation
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/robux-hack_GM431946152.pdfIn PDF document text
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-games_GM431946152.pdfIn PDF document text
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-online-free_GM431946152.pdfIn PDF document text
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spin-reward-links_GM406889139.pdfIn PDF document text
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-level-3_GM406889139.pdfIn PDF document text
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/hack-coin-master-apk-32_GM406889139.pdfIn PDF document text
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-tool-pc_GM406889139.pdfIn PDF document text
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-spin-link-coin-master_GM406889139.pdfIn PDF document text
    • https://penanggulanganbencana.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-link-today-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_003_off00004c46.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C46 24700 bytes
SHA-256: 1fb8c13adf568714ec6416a4c9d10d2a5674ab3a55338c98eb8ba685f6e9e405
font_01_sfnt_off00008561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8561 17852 bytes
SHA-256: 096069712db6b5d6732bcb1e197377aec390e00cd57ea8fb2786eb315a05e75d

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