Malicious PDF — malware analysis report

Static analysis result for SHA-256 3438d5b1d825fe1d…

MALICIOUS

PDF

49.6 KB Created: 2021-06-08 22:17:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: dec1ab22f96796fbefaeb3dfced879cd SHA-1: 2deed76d410958fecac68dc06c5124fa7f78d764 SHA-256: 3438d5b1d825fe1d9e8928c1ca6c661fdc023a1c5bfc2538cc29e6e56b656abc
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.tw/app/431946152/hack-roblox-jailbreak-mode-tp-btools-no-clip-game-hack PDF link annotation
    • http://perpus.fisip.unnur.ac.id/repository/minecraft-hack-mod_GM479516143.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/simple-game-hack-robux_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-free-spin-link-new_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-roblox-characters_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-coin-master-spins-2021-link_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/pubg-uc-bc-com_GM1330123889.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-hack-apk-facebook-login_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/pastebin-roblox-free-catalog-dominus_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/rewards-robux_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-online-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-free-spin-and-coin-link-2021-today_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_off0000531d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x531D 26152 bytes
SHA-256: a0c9d5768d770c0f2de86709bdd6955f0193de22bec0a55370143f8c5412accf
font_01_sfnt_off00008f6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F6A 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009c7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C7B 19120 bytes
SHA-256: 8ee79ff1d7f1ed161182c7dd9ae493d9616fd2e9b43e412751e5f5c02b70ef4e

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