Malicious PDF — malware analysis report

Static analysis result for SHA-256 bca88d9ad3e8b1cc…

MALICIOUS

PDF

34.1 KB Created: 2021-06-25 20:49:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 15a44770bb487026ef6b0613c52db30f SHA-1: f97275da892f62044091ca31b156fbb178099ac7 SHA-256: bca88d9ad3e8b1ccc363f5a697fef632bed9f5fc15499bc03cb5178f5200bb29
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links designed to lure the user into clicking on a 'free generator' or 'game hack'. The primary link, http://netcdn.co/app/431946152/hack-750-robux-game-hack, is identified as malicious redirector infrastructure. The document body also contains a call-to-action phrase, reinforcing the deceptive nature of the content.

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/hack-750-robux-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-clothing-on-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-get-free-robux-on-android-phone_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/tiktok-free-likes-and-views_GM835599320.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-freebies-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hack-roblox-tools_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-hack-version-download-2021-ios_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/minecraft-ore-finder-mod_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-inappropriate-games_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-hack-2021-link_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/archery-master-3d-unlimited-coins-hack_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/a-free-roblox-card_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/https-iosgodscom-topic-20214coinmasterhack_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-free-spin-link-today-50_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-roblox-templates_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-retrieve-hacked-account_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-adopt-me-pets_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_off00002d7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D7D 22540 bytes
SHA-256: 5fe395f79799c876004ffbb912484b73ee0d339f1e10fbc068ec1f0176cb5cd5
font_01_sfnt_off00005fa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FA8 19084 bytes
SHA-256: 6aa9e99b9ba14dea90dd05148f5e058ed738185272440c84072d15007694de5c

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