Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b5bd42475ea9809…

MALICIOUS

PDF

33.5 KB Created: 2021-07-03 14:31:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 2eb46f7ace6ee5989b1abfc9ed38f8a6 SHA-1: 279e25aecad7ec344afb574827159878e04beeb3 SHA-256: 4b5bd42475ea9809b5f174225be762aca56f9e50d03a7b20bf9b2f90169f96dd
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/robux-com-free-game-hack PDF link annotation
    • http://lib.akper17.ac.id/repository/www-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-robux-now_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/microsoft-robux_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-card-codes-generator-roblox_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/i-need-robux_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/pubg-uc-and-skins-buy_GM1330123889.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/coin-master-hack-download-android_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-minecraft-skin-packs_GM479516143.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/roblox-redeem-roblox-card-hack_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/free-robux-no-verification-2021-ios_GM431946152.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/easy-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://lib.akper17.ac.id/repository/coinmaster-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
font_00_sfnt_off00002c89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C89 22380 bytes
SHA-256: 656c3c1c3581a10b841167ca5aaeeff1419594aaaa954b59f340f9d647ed8fd6
font_01_sfnt_off00005e34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E34 18976 bytes
SHA-256: 27896acad5ca474033774e3721745fbaf6546dbb33b60a4a93bb974a81ff43ff

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