Malicious PDF — malware analysis report

Static analysis result for SHA-256 93ea23bc73ba3778…

MALICIOUS

PDF

34.4 KB Created: 2021-07-01 15:05:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2454549ccdd7bf801f87909ce4aa8b48 SHA-1: 9b865c141b0e63c4bf5078ba5e577b0f042b13b1 SHA-256: 93ea23bc73ba3778624140eb20b10b792721665ef8dc56c36d504a4d4a47204d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links designed to lure users into clicking on what appears to be a "free generator / game hack". The primary link, http://netcdn.co/app/431946152/free-robux-online-no-human-verification-game-hack, is identified as a malicious redirector. The document body and embedded URLs suggest a social engineering tactic to drive traffic to potentially malicious sites, likely for credential harvesting or malware distribution. No scripts were extracted, but the PDF structure and embedded URLs strongly indicate a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/free-robux-online-no-human-verification-game-hack In PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/rocash-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/cheat-roblox-windows-10-magnet-simulator-2021_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-roblox-birthday-printables_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-book-bags-on-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/logo-roblox-cafe-gfx-free_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/juego-de-roblox-hecho-por-un-hacker_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-robux-generator-no-human-verification-real_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/inappropriate-roblox-games_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-hack-game-apk_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/how-to-hack-roblox-ban-accounts_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/free-spins-coin-master-daily_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/hack-roblox-account-online_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/coin-master-apk-hack-mod-download_GM406889139.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-free-executor_GM431946152.pdfIn PDF document text
    • http://stikespantirapih.ac.id/home/repository/roblox-password-hacker-august-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_off00002f5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F5A 22176 bytes
SHA-256: 1349aa857a4534d7c13a8e8d69e455c106199a1adbf77fbca41ccee7f7e9a85f
font_01_sfnt_off00006098.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6098 19408 bytes
SHA-256: 3c2108a6f858531472d830d84d715f7063d030debbbaec7de581102b783233ee

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