Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca8243ab72d2a5b2…

MALICIOUS

PDF

34.1 KB Created: 2021-06-27 00:02:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: efa77af008c69e2fea045e4d2daea4b0 SHA-1: 3957f6b258aa8709ae7aa6ccbac2eed507b72f5d SHA-256: ca8243ab72d2a5b244e51627d888cb70060bd2de9d448d3fcf29ebbbd9c09b0e
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.co/app/431946152/cheat-engine-roblox-2021-robux-game-hack PDF link annotation
    • http://perpus.fisip.unnur.ac.id/repository/how-to-hack-roblox-tutorial-for-9-year-olds_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/extreme-roblox-hack_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-minecraft-account-and-password-generator_GM479516143.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/heroes-online-is-free-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-tycoon-de-hacker_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-get-free-coins-on-assassin-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-robux-generator-no-surveys-and-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/easy-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/minecraft-story-mode-free_GM479516143.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/hacks-for-roblox-weight-lifting-simulator-3_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-roblox-gift-cards-nov-2021_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-robux-live_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-game-hack-app-download_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-hack-skript-ve_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/pokemon-go-free-raid-pass_GM1094591345.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-robux-with-no-verification-2021_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_off00002ead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EAD 21928 bytes
SHA-256: 2c0180f5e774ccb696c2504348b4dc7357403f81dd75034062ecd8faf67eef7a
font_01_sfnt_off00005f08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F08 19420 bytes
SHA-256: c690c6822801120cf9dae472b61c53170035d6afbcf8cf0820b8c88ff5917671

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