Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9c22ed779b1bf54…

MALICIOUS

PDF

44.1 KB Created: 2021-06-03 09:58:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 3fd04587bc5ce2310b841982bd501d9d SHA-1: 4da93f619e4366f3d5dff2837c09afd859250073 SHA-256: c9c22ed779b1bf54fb2362cbfeb929c03c7142ce50ca92f294d3e1f2cc54f6d1
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 0.9865

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/rblx-city-free-robux-game-hack PDF link annotation
    • http://digilib.unla.ac.id/repository/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-dominus-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-generator-without-verification_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/saving-pikachu-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-free-coins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-legally-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/pubg-uc-500_GM1330123889.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-hack-ios-10_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-coins-and-spins-link_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-spin-and-coin-link-today_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-spin-trick_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-coins-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/robux-generator-com_GM431946152.pdfIn PDF document text
    • https://collectrobux.coIn 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_off00004e42.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E42 25808 bytes
SHA-256: f7f7e630f143b2ba3fbb9ca52e9a6a0ae26fc0c7684183bc4c7d0988eb1a50fa
font_01_sfnt_off000088f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88F7 18492 bytes
SHA-256: 8c36c54b235ee774b4288e3a660071bec0b4f54d4ae0ca28de0be66b92090129

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