Malicious PDF — malware analysis report

Static analysis result for SHA-256 59f2dc1258d0d086…

MALICIOUS

PDF

45.7 KB Created: 2021-06-09 02:56:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d5b7e5f0589c7e5fb205913e21a7f4a8 SHA-1: ec6762fc1293a9bf7946701319057fbde1016f43 SHA-256: 59f2dc1258d0d0866587381e5b5102dc3fc75448859db1f3327862ab691bb6ea
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 0.9864

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.tw/app/431946152/robux-how-to-make-a-promo-code-hack-game-hack PDF link annotation
    • https://library.itn.ac.id/perpusitn/repository/roblox-survey-for-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-free-spins-for-iphone_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/robux-for-offers_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/minecraft-pe-hack-client-ios_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/if-i-uninstall-minecraft-can-i-reinstall-it-for-free_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-free-roblox-premium_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-free-100-spin-link_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-links-coin-master_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-hack-dot-xyz_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/http-blackgamesus-coinmasterhack_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-hack-apk-android-1_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/mcpe-com_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/robux-generator_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
stream_004_off000050d7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50D7 26336 bytes
SHA-256: 1f65e5bc3a358e17eb149990b7a2c64dd64c1b95f07bdd4ef2b9f9e33ec04539
font_01_sfnt_off00008d8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D8A 19196 bytes
SHA-256: 5fecf8c6ee9730d5e774b032af5b417761413eeed8f1b3a182a8f9647df278c3

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