Malicious PDF — malware analysis report

Static analysis result for SHA-256 547c4db16f9e6482…

MALICIOUS

PDF

46.6 KB Created: 2021-05-17 06:00:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f1e514c2d7297f4f0cb04a84c686620f SHA-1: afd2d4786d4a11c7bf5668e6de6bcd9c15f45140 SHA-256: 547c4db16f9e64823937225f86b48833011dff9bfa53e8ec6ef22128dd261027
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.8948

Heuristics 4

  • 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.
  • 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 https://netcdn.xyz/app/431946152/free-robux-easy-game-hack PDF link annotation
    • http://library.persadabunda.ac.id/repository/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-fan-hack_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/microsoft-roblox_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/hack-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-get-stuff-that-cost-coins-free-mcpe-master_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/generator-robux_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-tricks-and-hacks_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000045ab.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x45AB 28652 bytes
SHA-256: a2073e90eb5c7fb263e09b048f549da079325d781b7b58804c876e8e4c591ce5
font_01_sfnt_off000086b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86B8 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00009360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9360 18420 bytes
SHA-256: 93fb4fe90c413bceeeea5373daaca89ae05c83417e443247d622c1bd09cfd34e

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