Malicious PDF — malware analysis report

Static analysis result for SHA-256 93e72660932df5c3…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 17:10:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 295c78e314f1c6665c72b217ac9f2b0f SHA-1: 6e5923affb215a2796068e3b67d20ad3c820ef97 SHA-256: 93e72660932df5c3477cbef8f8f38e217421f119dd67bdb0955b9d0b9355c838
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'Coin Master Free Spins Apk 2021' and other game-related hacks. The presence of a download button lure and the ML classifier's high confidence score indicate a malicious intent to direct users to potentially harmful content or further exploit stages. No scripts were extracted from this sample.

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.tw/app/406889139/coin-master-free-spins-apk-2021-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-spins-apk-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-can-you-get-robux-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/are-there-and-free-safe-roblox-exploits-v3rmillion_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/get-free-robux-with-offers_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/minecraft-free-install_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/hack-roblox-for-robux-for-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-to-copy-remote-functions-hack-in-roblox_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/pc-roblox-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-free-spins-link-without-human-verification_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/2021-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/robloxcom-robux-and-tickets-hack_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/add-free-robux-pastebin_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_off000031bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31BC 22672 bytes
SHA-256: 929aa1e8eb865c10be3ecb7f7738c00af420bce86b2c19c7874f5d39e552dd47
font_01_sfnt_off00006483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6483 18748 bytes
SHA-256: 5e77ef61f71b9edceb1db79b59856649b40968d05cf737e8f2ff8c48d385844d

Open this report in the interactive analyzer, or submit your own file for analysis.