Malicious PDF — malware analysis report

Static analysis result for SHA-256 99a0ac0930cb0793…

MALICIOUS

PDF

46.8 KB Created: 2021-06-04 03:15:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 54bf5e4f72de0627b6fb67d66bdae3cb SHA-1: 7ec08203200edc72e641b3f0ae7963833b225895 SHA-256: 99a0ac0930cb0793528984b6433a6e6f12330298ee85d19b184a71c15e100256
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains links to malicious redirectors, specifically promoting 'Roblox Hack Unlimited Robux'. The document body and embedded URLs suggest a lure to download a malicious payload or visit a scam website. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent, likely to trick users into downloading malware or engaging in fraudulent activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

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 https://netcdn.online/app/431946152/roblox-hack-unlimited-robux-game-hack In PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/coin-master-daily-free-spins-link-today-2021-free_GM406889139.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/coin-master-free-spins-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/how-to-create-group-in-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/coin-master-hack-tool-without-human-verification_GM406889139.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/how-to-get-free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/free-robux-no-survey-or-human-verification_GM431946152.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/free-spins-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/robuxmatchcon_GM431946152.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/coin-master-free-spin-2912-2021_GM406889139.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/minecraft-menu_GM479516143.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/master-coin-free_GM406889139.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/minecraft-pocket-apk_GM479516143.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pengolahan.perpus.wima.ac.id/repository/coin-master-hack-ios-download-2021_GM406889139.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
stream_004_off0000542b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x542B 26492 bytes
SHA-256: f3b0ad67a8e6450c0d4b911d9c43797e8947e147208668cee231791c8f497bde
font_01_sfnt_off000091f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91F4 19168 bytes
SHA-256: c229ae85f225584a05b8ae3a5d05ef5eb919d65508796bcf435d04f59e516df3

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