Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa9d3f06874c15f5…

MALICIOUS

PDF

34.9 KB Created: 2021-07-09 16:44:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: b38a7a14c3ce49d7153c18002a1fe117 SHA-1: d63e057212b9c801b9c5fcb5f3c33066bb408bae SHA-256: aa9d3f06874c15f5c99e20aa7d0135a32676abfab9a87483c077c48de4384a72
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/free-robux-without-human-verification-real-game-hack PDF link annotation
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-the-cheat-engine-on-roblox_GM431946152.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-save_GM406889139.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-money-on-bloxburg-roblox_GM431946152.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-in-roblox-on-iphone_GM431946152.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/give-me-robux_GM431946152.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-in-roblox-youtube_GM431946152.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-on-ipad-2021_GM431946152.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-coins-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-redeem-codes-2021_GM431946152.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/adidas-t-shirt-for-roblox-free_GM431946152.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/free-robux-just-for-singing-up_GM431946152.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/minecraft-java-free-account_GM479516143.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/best-free-t-shirts-on-roblox_GM431946152.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/minecraft-pe-apk-free-download_GM479516143.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/roblox-account-being-hacked_GM431946152.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • http://bpm.denpasarkota.go.id/new/public/ckfinder/userfiles/files/tiktok-free-upload_GM835599320.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_off00003022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3022 22204 bytes
SHA-256: 58fd162e732d57dddb78d1aaec7bf5d951193bb3f11d1543bc6824fbb29cce5b
font_01_sfnt_off000061a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A3 19772 bytes
SHA-256: fc568478bc399a77401a6ddd4d7c7c349cb7de37f92cd72754d4c54c01944b1d

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