Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb854f1c42d11f27…

MALICIOUS

PDF

34.4 KB Created: 2021-06-25 14:06:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 6d58cca46bd13591a0e0aeb8a5f828d2 SHA-1: ee31231756ad19ace229959c002c85f77a665905 SHA-256: cb854f1c42d11f27dce7f03bb1ad2fd94fb493f542647770fdfdc9eef2fc335a
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links to external websites, with a primary URL pointing to a 'free robux generator' lure. The presence of a fake CAPTCHA heuristic indicates the document is designed to trick users into interacting with these links, likely leading to further malicious content or downloads. No scripts were extracted from this sample.

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.
  • 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 http://netcdn.co/app/431946152/free-robux-2021-no-survey-no-download-game-hack PDF link annotation
    • http://library.poltekkes-palangkaraya.ac.id/repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id//repository/coin-master-cheat-apk-free-download_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/wurst-112_GM479516143.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id//repository/roblox-game-free-download_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/how-to-get-book-wings-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/coin-master-free-spins-11-01-2021_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/free-roblox-robux-2021_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/robux-generator-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/vehicle-simulator-roblox-money-cheat_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/free-minecraft-severs_GM479516143.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id//repository/mcpe-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id//repository/coin-master-free-bonus_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/transparent-shirt-template-roblox-free-shipping_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/free-bling-bling-card-coin-master_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id//repository/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/coin-master-support_GM406889139.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id//repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://library.poltekkes-palangkaraya.ac.id/repository/coin-master-hack-online-no-human-verification_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
font_00_sfnt_off00002ea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EA1 21776 bytes
SHA-256: 84c807f96c2d9ff4a6b3e09ca56082988f2c19ccb9dd63010454a48621781ef0
font_01_sfnt_off00005e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E83 19992 bytes
SHA-256: 5a09742d18cf8ffceff139d027112446897fffead2b0c9d42e94765ec44fc60d

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