Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbbadf16884a258a…

MALICIOUS

PDF

35.1 KB Created: 2021-07-05 13:29:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4d6a180ee9a13810089f594bf4e88a69 SHA-1: af0187dff5fe3fa28ed74225df6553d28a33070d SHA-256: bbbadf16884a258aa8c080b21063c2d8cef98224857db5df52e8414af1d0d517
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9980

Heuristics 4

  • 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.
  • 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/431946152/roblox-install-free-game-hack PDF link annotation
    • http://chem.ipb.ac.id/kim/repository/free-robux-codes-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/robux-place-rewards_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/block-best-robux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-2021_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-spins-coin-master-legit_GM406889139.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-robux-without-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-robux-no-verification-required_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/tiktok-free-search_GM835599320.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/fake-robux-codes_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/free-promocodes-for-roblox_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-to-make-clothes-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/how-can-you-get-robux_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/earn-robux-now_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/does-roblox-premium-expire_GM431946152.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/minecraft-free-download-android-apk-014-0_GM479516143.pdfIn PDF document text
    • http://chem.ipb.ac.id/kim/repository/coin-master-free-spins-and-coins-haktuts_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_off0000335b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x335B 22392 bytes
SHA-256: 6a96377aab0d24ad0b0c2f887f65ab340ae2d10a413e3e23ee47e6b0935c8778
font_01_sfnt_off000064ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64EE 18752 bytes
SHA-256: 1d55b3fd9f6369f8e68c2ca1b9c300169a68fb96c94d2ac67d1ae5c18d40cf4f

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