Malicious PDF — malware analysis report

Static analysis result for SHA-256 23a4f2bab0cc9dd4…

MALICIOUS

PDF

47.6 KB Created: 2021-06-04 01:23:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 192fbf82bcf2f2807dcf231673a95b3f SHA-1: dc4827729b7775644e8593278f9a82dc860a57e7 SHA-256: 23a4f2bab0cc9dd4f5a80f6738766220f87f4acda3aa3cca095781d709b92c3b
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 0.9769

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.online/app/431946152/blox-best-robux-game-hack PDF link annotation
    • http://digilib.stie-yppi.ac.id/repository/level-coin_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/roblox-free-items_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-spin-appscoin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/pasos-para-hackear-coins-master_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-hack-online-android_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/minecraft-hacked-apk_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coinmasterfreespins_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/minecraft-18-9-hacked-client_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-hack-spin-generator_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_004_off000052f0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52F0 25848 bytes
SHA-256: ebe31c519002505756b40d7893b68634007eae5396635a258815c0bc5c85ebe0
font_01_sfnt_off00008e17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E17 2844 bytes
SHA-256: d4efd49219a7ff6424c923a6ccef5b7e1750ded18bbd79546f2ad196ddc76c43
font_02_sfnt_off000097d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x97D7 18028 bytes
SHA-256: c8ab82621ec7f064c11414a5e1a29f386e261b50dcc0eed2286f6c560c7e59c4

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