Malicious PDF — malware analysis report

Static analysis result for SHA-256 204b0a95f7d4ce4c…

MALICIOUS

PDF

32.9 KB Created: 2021-07-04 13:19:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 71b1362861b80d8bde56ea83832a7327 SHA-1: ff0ceda3b478fdcd559e0c41494ff3ee77f45a96 SHA-256: 204b0a95f7d4ce4c6926002b558f456b01f949fd4bce777df3bb3a443a2965f9
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. It uses a LOLBin command-execution lure. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 5

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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-headless-head-roblox-game-hack PDF link annotation
    • http://library.unissula.ac.id/fk/repository/free-robux-cheats-codes_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/roblox-girl-avatar_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/coin-master-money-hack_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/game-toolbox_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/do-you-get-windows-10-minecraft-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/free-robux-no-offers-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-spins-coin-master-android_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/free-robux-no-human-verification-generator_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/roblox-free-vip-server-pet-simulator_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/tiktok-free-view-followers_GM835599320.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/hacker-of-roblox-that-log-into-your-account_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/youtube-free-build-roblox_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/comandos-cmd-juegos-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.unissula.ac.id/fk//repository/coin-master-hack-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fk/repository/how-to-robux_GM431946152.pdfIn macro / runtime command snippet
    • http://library.unissula.ac.id/fk//repository/coin-master-free-spins-and-coins-today_GM406889139.pdfIn PDF document text
    • http://library.unissula.ac.id/fe/repository/how-to-get-infinite-robux_GM431946152.pdfIn PDF document text
    • http://library.uIn macro / runtime command snippet
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_001_off00002b64.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2B64 22484 bytes
SHA-256: 78ed19f64016102f196edbfb57ea0e483545d413c96fa9bab05a0dca71f9d015
font_01_sfnt_off00005ca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CA2 18824 bytes
SHA-256: 7384526ce2dd4d92cd45550fda12bae152729c1e692f7aa7bf6070bc228cd510

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