Malicious PDF — malware analysis report

Static analysis result for SHA-256 47818ce8877b50c8…

MALICIOUS

PDF

34.1 KB Created: 2021-07-06 08:00:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 9fdc578c504a4a1aa10b1a2b0f625c91 SHA-1: 84e9c43f65c315d36abe2881bc48a4c7eb45a6c3 SHA-256: 47818ce8877b50c8552cab121bb3d343e8b4533cd60dabd97a3f177936c2e24e
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a lure of 'free Robux' and 'game hacks' to entice users into clicking malicious links. The primary link, http://netcdn.tw/app/431946152/free-robux-easy-game-hack, is directly associated with a high-severity heuristic for game hack redirects. The document's content and embedded URLs strongly suggest a phishing or malware distribution attempt, likely leveraging a client-side exploit or redirect chain to deliver a payload.

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-easy-game-hack PDF link annotation
    • https://www.knjiznica-oroslavje.hr/files/download-coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/minecraft-toolbox-premium-apk_GM479516143.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/how-to-get-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-robux-real_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/free-robux-legit_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/make-robux_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/como-hackear-robux-verdadero-no-fail_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/how-to-hack-coin-master-apple_GM406889139.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/coin-master-hack-no-survey-2021_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/coin-master-free-spins-and-coins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://knjiznica-oroslavje.hr/files/free-robux-service_GM431946152.pdfIn PDF document text
    • https://www.knjiznica-oroslavje.hr/files/free-spin-coin-master-iphone_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_off00003065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3065 21884 bytes
SHA-256: a5cb8d83050898a6f5323a2ef135dffcadd6437bbb42f90e0a61aa7840723965
font_01_sfnt_off00006081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6081 18896 bytes
SHA-256: 08474bdc287d3651cd8985bef3354d1e01eac2de28e8a43cfa13c093cfea4674

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