Malicious PDF — malware analysis report

Static analysis result for SHA-256 57e27d6184b40bb5…

MALICIOUS

PDF

35.1 KB Created: 2021-07-06 07:32:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: a5aee851fa6d495cec1d1e3c5d838392 SHA-1: 9dcf5a386d1538407cdb57c992ce9fab648a7670 SHA-256: 57e27d6184b40bb538136cee989cb8508b57940c492d04b320855b270b00e414
82 Risk Score

Malware Insights

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

This PDF document contains multiple embedded URLs that are designed to lure users into clicking on links promising game hacks and free currency. The primary URL, http://netcdn.tw/app/406889139/coin-master-free-spins-deutsch-download-ios-link-game-hack, is flagged as a game hack redirector. The ML classifier also strongly indicated maliciousness. The document's content and heuristics suggest a social engineering tactic to drive traffic to potentially malicious sites.

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/406889139/coin-master-free-spins-deutsch-download-ios-link-game-hack PDF link annotation
    • http://lib.stie-aub.ac.id/repository/mcpe-master-hack-unlimited-coins_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/hack-peoples-accounts-oh-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-get-free-robux-2021-no-hack_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/rbx-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-gift-card-generator-hack_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-rewards-site_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-roblox-cards-by-doing_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/download-hack-roblox-bee-swarm-simulator_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-bandit-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/admin-script-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-hack-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/roblox-hacks-v65-free-no-downoald_GM431946152.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/hack-coin-master-apk-32-download_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://lib.stie-aub.ac.id/repository/free-robux-quiz-answers_GM431946152.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_002_off00002f25.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F25 23244 bytes
SHA-256: a06d10c92ebb7f85cc428ed2b7eda74cfa26cf15bd484a67f54b18e5e8d47e08
font_01_sfnt_off000063c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C6 19228 bytes
SHA-256: 634a6888a1904234b303079f3dc1bf5a4e5ffef1388b284b3e88d08e2c9e8665

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