Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7874cfb194c4b6e…

MALICIOUS

PDF

48.2 KB Created: 2021-06-04 00:30:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 709280bdc0e1d2a4ec8c531317b7501e SHA-1: e53476791e8984d3843c5e5d12fd84db7b69e7a8 SHA-256: f7874cfb194c4b6ef7c680a37a10b00a9884f949bc27a95defdd7a27f38a67db
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 0.9796

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/robux-free-gift-card-org-hack-game-hack PDF link annotation
    • https://lib.insan-unggul.ac.id/repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/freer-tiktok_GM835599320.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/is-free-robux-real_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-limiteds-roblox_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/minecraft-free-no-virus_GM479516143.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/coin-master-hack-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/roblox-hack-site_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/get-free-spins-coin-master-october-2021_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/minecraft-hacked-apk_GM479516143.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/aimbot-exe-roblox_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/game-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • https://lib.insan-unggul.ac.id/repository/free-robux-websites-2021_GM431946152.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_off0000507b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x507B 27404 bytes
SHA-256: e4709087c0ac4efae8f0eeda48099bfbda841a336fb01582d946da0acf2e72a4
font_01_sfnt_off00008ce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CE6 2940 bytes
SHA-256: ae8acc7f13e86db3aed98d7dfb73e70e16f4dedb45e9f0467460b76f54e1a1bb
font_02_sfnt_off000096f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96F5 19096 bytes
SHA-256: bb2bfd1b5c80cb1744cd57562806e4410c1e72fb9e1ed3dff7cfd9b3dcead9ac

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