Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4b09c514b1f6748…

MALICIOUS

PDF

35.2 KB Created: 2021-07-06 11:21:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b26f55416ced1d0b4725668ee8d3acb0 SHA-1: 15477a0722027c636fdd7589e8291403652266b4 SHA-256: a4b09c514b1f6748aa6bf2ad655c56995ca0d56436fa262bb4049e79cdd2a86e
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/406889139/hack-coin-master-for-android-game-hack PDF link annotation
    • http://lib.teknik.unimal.ac.id/repository/make-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-free-spins-android_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-free-tycoon_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-cheat-engine-walk-speed_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/descargar-hack-de-roblox-para-android_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/hack-de-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/youtube-free-robux-and-obc_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/tiktok-free-2021-likes_GM835599320.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/robux-800-fre_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-get-free-headphones-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/roblox-gang-rape_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-tiktok-fans-no-verification-2021_GM835599320.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-ps3-free_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-hacks-for-iphone_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/win-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/www-roblox-com-robux-free_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
font_00_sfnt_off00003224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3224 23244 bytes
SHA-256: 02d1e2b199269efefc67bef865b0c8e408632fd09772df17991a33bf3b47d4ec
font_01_sfnt_off000066b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66B0 18340 bytes
SHA-256: ba94336477aed2da98f1e66ca7f9a6cc3eca9255aee4556c7b4d343eb67aac4d

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