Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebf18c62af0b5898…

MALICIOUS

PDF

34.2 KB Created: 2021-06-19 12:38:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 6844d2ee4dec12ceb2558b28fc838c34 SHA-1: 6a75e4d96b26bb449c5977a0145bbcc0385d79b3 SHA-256: ebf18c62af0b589856ea1857af681159495fa0bbcbe3f0bf64cbdb0d1b73c4d6
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple links pointing to a known malicious redirector infrastructure, specifically advertising 'free Robux' or game hacks. The heuristic firings confirm the presence of malicious redirector links and a lure for game-related generators. While no scripts were extracted, the document body and heuristics strongly indicate a phishing or scam attempt designed to redirect users to potentially harmful websites.

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/get-500-free-robux-game-hack In PDF document text
    • https://fib.ub.ac.id/sac//repository/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-generator-codes_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/pubg-uc-official-price_GM1330123889.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/is-there-any-tricks-or-working-hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-pet-treats-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/roblox-hacked-accounts-list_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/easy-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-hack-through-walls-in-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/robux-download_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-el-tiger-card-free_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-hack-apk-link_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/demon-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-pc-no-human-verification_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/websites-that-give-free-robux_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_off00002ed6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED6 22200 bytes
SHA-256: 2fd7534bbabf509b00d2762ec56ab6db27282121b041ca7c1374a32445d67a7a
font_01_sfnt_off00006044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6044 19124 bytes
SHA-256: 60c35275b83183850c8449d9b9bfa9d5f98d48dd493c49f86d419bcd314676b3

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