Malicious PDF — malware analysis report

Static analysis result for SHA-256 826cc66ff76caab2…

MALICIOUS

PDF

35.7 KB Created: 2021-07-06 12:29:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: cef781d0b60f2718875ce9eb1049b682 SHA-1: 223aa1f57d37299969420c65b0c9009f9195fd92 SHA-256: 826cc66ff76caab28862666c19bdd3464de2b56afb58a6c362c866182ed60577
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9980

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 http://netcdn.tw/app/406889139/coin-master-apk-hack-download-game-hack PDF link annotation
    • https://opac.umrah.ac.id/repository/how-to-get-free-tix-on-roblox-high-school_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-jailbreak-unlimited-free-money-hack_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/haktutsin-2021-09-coinmaster50freespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-hack-unblock-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/get-me-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/piano-hack-roblox-download_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/hack-roblox-in-game_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/get-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/code-how-to-get-2021-free-crystals-roblox-skybound-2_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/script-hack-roblox-ro-ghoul_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-claim-now_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/is-minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-link_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/soporte-para-reportar-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-works-no-surveys-no-human-verification-code_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-robux-2021-feb-eazy_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_002_off0000333f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x333F 23304 bytes
SHA-256: 3062f581b989ea34a2b171dfc25c270564ae7e76c1ac85b73659641def59d44c
font_01_sfnt_off0000676b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x676B 18760 bytes
SHA-256: 30bf4c30f3c0eb142596fd9d0e19526318396ceed582c1749ee22e7ad80b2b4d

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